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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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  #1  
Old 07-07-2010, 08:57 AM
1995_f150 1995_f150 is offline
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1995 302-351 swap

I have a 1995 f150 with a 302. I was wondering how hard it would be to swap it out wit a 351 or if I should just go with a 302 again. Or should I rebuild the 302 thats in it. It has 221,xxx miles on it. What do you think I should do?
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Old 07-07-2010, 09:08 AM
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351w are a better overall truck motors. 351w are in plentiful supply so you could probabl find one although you will have to get a 351w with all the fuel injection and intake manifolds. you computer and tranny should work just fine... although the motor mounts might be different... How much are you wanting to spend? what is the overall use and purpose for the truck??? Need more info before we can tell you what you might want to consider.
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Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

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Old 07-07-2010, 09:14 AM
1995_f150 1995_f150 is offline
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I would like to spend the smallest amount possible. I used the truck for hauling and pulling and would continue to do the same with it.
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Old 07-07-2010, 09:21 AM
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if you are hauling and pulling with it... The best thing would be to get a 351w with EFI... Maybe find one that needs a head gasket but has a good short block/bottom end. That way you can refresh the 351w with new gaskets and seals replace water and oil pump and you'll have a motor ready to go into your truck... This way a swap can be done in a a weekend. your 302 is ok for hauling a pulling but probably not ideal. What is wrong with it that you are wanting to rebuild or replace??? Just remember when shopping for and engine you should get one that has a good rotating assembly because other wise you are looking at a big machine shop bill.

like i said you best options would be to find a cheap, low milage, complete 351w... freshen it up and swap it in over a weekend.

your absolute cheapest option would be to get good running cheap 302 and slap it in... rebuilding a ford small block is never the cheapest solution after the machine shop, new parts, and all the time you'll have in it. take a look at this wikipedia page at the 92-96 gen fords... it will show you the power and torque ratings...

http://en.wikipedia.org/wiki/F150
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02 F250 SD 4x4 V10 4R100 SCLB
Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

Nathan - FTE Iowa Chapter
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Old 07-07-2010, 09:24 AM
1995_f150 1995_f150 is offline
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Ok thanks. The 302 thats in there has high miles started leakingoil bad and now sometimes wont start or turn over other times it will. Would a 351 bolt right in? or would I have to change the mounts up?
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  #6  
Old 07-07-2010, 09:48 AM
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the mounts I am unsure about... they are both sbf engines so it might bolt right up but if it doesn't you should just pull them from a junk yard truck for $10... i made addition to my previous post..
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02 F250 SD 4x4 V10 4R100 SCLB
Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

Nathan - FTE Iowa Chapter
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Old 07-07-2010, 09:56 AM
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The 5.8 uses the same engine mounts and bolts to the same tranmissions, but it requires a 28oz flexplate (5.0 has a 50oz version), and because it is physically wider and taller will require a 5.8 specific Y-pipe or modifications to the 5.0 Y-pipe. There are also a lot of unique parts on the 5.8 that won't transfer from the 5.0 so you will need a complete 5.8 EFI to swap in. I have done this swap and it's really not that bad, no wiring or computer changes necessary as long as your truck is mass air, and the 5.8 is a far better truck motor so it's easily worth the effort if you're pulling the motor anyway. Things you can re-use from the 5.0 are the accessory brackets and starter, injectors, throttlebody, and all sensors and actuators.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
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Old 07-07-2010, 09:56 AM
1995_f150 1995_f150 is offline
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Well I would rather have enough power. Would I be better of swaping the tranny out also?
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Old 07-07-2010, 10:01 AM
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Don't change the transmission of you don't have to, if anything change the axle gearing to 3.73 or 4.10.. especially if your truck now has 3.31 or 3.08 gears.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
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Old 07-07-2010, 10:06 AM
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My trans slips already. What would be my best way to go with that if I went with the 351w?
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  #11  
Old 07-07-2010, 10:20 AM
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we are talking about this in another post right now... try doing a couple things first

A.) pull codes and see if those tell you anything
B.) change the tranny fluid and filter you'd be surprised at what a fluid change can do...
read here for more info.
http://www.ford-trucks.com/forums/96...ew-tranny.html

You should have a E40D and a good one at that... The earlier 90's had problems that should be factory fixed in yours... If you are slipping I would suggest trying a fluid change and see if that makes a difference b4 you pull the 302. If not talk to your local parts store guys... they could probably give you the name of a tranny mechanic that could do a weekend rebuild for 1/2 the price and would be a better option than getting another 2nd hand tranny that might go bad in a year... Tranny guys are usually always willing to do a cash side job... At least the ones around here are...
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02 F250 SD 4x4 V10 4R100 SCLB
Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

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  #12  
Old 07-07-2010, 10:25 AM
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all this being said you might want to take a look on your local craigslist to find a 351w truck that will already have all you need. I can pick up parts trucks for $300 here in iowa... plus you and strip extra parts and send the rest to the junk yard for $150 once your done! Just a thought. Trucks that have been recked or have a bad rear end or bad tranny would be a good cheap find for you...
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02 F250 SD 4x4 V10 4R100 SCLB
Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

Nathan - FTE Iowa Chapter
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Old 07-07-2010, 04:41 PM
1995_f150 1995_f150 is offline
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Thanks for all the information. Im looking at getting a 351w. Would the wireharness be different? Would I have to change it?
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  #14  
Old 07-07-2010, 09:56 PM
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@bobbobmoran
as conaski has said this swap isnt that bad at all i too have done it.. i had a complete 351 intake to pan that i swapped in place of a 302.. jus need the 28oz flexplate and would have to do something about the y pipe i myself jus got the exhaust redone.. i used all the same wiring as long as your truck is mass air u wont have a problem
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Old 07-08-2010, 11:21 AM
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1995_F150 just find yourself a complete 351w complete from intake to pan... Also get the origional flexplate with it and you'll be fine! I know you can pull one in the yard by me complete for $250... If it were me I would just do that and haggle for the 351w y pipe and flex plate to be included.

If you do go used and get a cheap one like that I would stop by the parts store for a 351w gasket set... Also take a battery, gas and compression tester with you. Test all your cylinders and hopefully get it running to hear it. As long as you get a decent short block the rest should be cake! Also inspect your motor mounts... if they are shot you might want to replace those while engine is out. I would also suggest a new oil pump, screen, and fel-pro pan gasket. The oil pumps are a PITA if you have to do them later!
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02 F250 SD 4x4 V10 4R100 SCLB
Thumper 88 F250 ZF 4x4 4.9L 3G 238K-main work horse
Zeus 89 F250 ZF 4x4 351w 143K
Ol' Girl 83 F150 NP208 300 T18 - For sale!

Nathan - FTE Iowa Chapter
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Old 07-08-2010, 11:21 AM
 
 
 
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