engine swap in a 4x4
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Junior User
Joined: Jan 2005
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From: Victoria Canada
engine swap in a 4x4
I have a bronco 4x4 with a tired 302 in it. I want to swap in a 351W that I have, that came out of a car. Will I have any issues to deal with such as oil pan clearance? Also the 302 is EFI and the 351 is going to be carb'd, which pump needs to be bypassed to keep a proper fuel psi?
Cargo Master
Joined: Dec 2003
Posts: 2,735
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From: Sunny Florida
You never gave what year bronco you have. Some where along the line I think ford went to one fuel pump instead of two. Either way it won't matter because those pumps run at a very high pressure and a carb will only need 5 to 6 psi. You would need to keep the fuel pumps intack and the return line intack as well and install an ajustable regulator for your application. I have never done this but I see no reason why it wouldn't work. It would be alot cheaper and easier to just take out the EFI pumps and install a good old fule pump for a carb in the timing cover and that's if the 351W had a carb on it already. If it didn't have a carb then you need to buy a the fuel pump eccentric and install it.
The exhaust y-pipe is different on the 302 and the 351W. The car oil pan pans are different, front sump and it depends on what car it came from. You need a rear sump pan and pick up.
The exhaust y-pipe is different on the 302 and the 351W. The car oil pan pans are different, front sump and it depends on what car it came from. You need a rear sump pan and pick up.
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Junior User
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From: Victoria Canada
Whoops. The Bronco is an "86. The windsor most recently came out af a '66 fairlane. It currently runs off of a fuel pump in the block. I guess I can just choose the appropriate fuel line and tap into it, leaving the other capped in case I decide to go back to the efi302? Will I have to remove the pump from the tank as well or will I be able to suck fuel through the de-energized pump in the tank?
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
your going about this the hard way. go on ebay or your local wreckyard and buy the lower/upper intake from an efi 5.8 get the front timing cover and oil pan. you can use your 302 harness on the 351w . get a tfi mounted dizzy from a 90+ 5.8 and your set for the most part. all of your assesory brackets from your 302 will fit on the 351. also because that motor came out of a car you will need to swap that cam out because its power range is way different then whats needed for a 4x4 truck. stay efi its much better.
Tuned
Joined: Mar 2004
Posts: 281
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From: Petersburg, MI
You also need the right flexplate for your engine/tans combo. Don't forget a new EEC for the 351. I definitely agree stay EFI. I have a 351 upper and lower intake with the TB still on it and a lot of other 351 parts from a 1990 EB I'm parting out(including a running 351 complete from intake to oil pan) if you're interested.
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Junior User
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From: Victoria Canada
Actually, what I was planning was to swap in the windsor and rebuilding the 302. After I rebuild the 302, I was intending to put the windsor back in the corner until a better project came along for it. The windsor has more years than miles on it, it was broken in then pulled and put in the corner. Swapping the dist, timing cover, oil pan, cam, oil pump, upper/lower manifold sounds like too much of a bother. I may just leave the truck to rot where it sits.
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Hotshot
Joined: Jul 2002
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From: Bend,OR
sounds like your scared to me ,, just kidding. evil it really isnt that hard especially if you already have efi on the rig. its the switching back and forth that will be more troublesome. also once you put that 351 in there you wont ever go back to the 302. after i did my 5.8 swap i actually get better performance and mpg then i did with the 302 i had in it. 302 got 12/14 5.8 12/16 thats city/hwy
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Junior User
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From: Victoria Canada
Originally Posted by Kemicalburns
also once you put that 351 in there you wont ever go back to the 302.
The biggest hassle I am having right now, is in tracking down an oil pan/pump. Do you know if a 351W in a van will have the correct pan and pump for this application? Or perhaps if it came down to this, could I use the top half (flange side) of the 351 oil pan, and weld the bottom side of the 302 oil pan onto it and then use all the 302 oil pump goods?
Senior User
Joined: Nov 2003
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From: Camden County, NC
Originally Posted by RLKBOB
You also need the right flexplate for your engine/tans combo. Don't forget a new EEC for the 351. I definitely agree stay EFI. I have a 351 upper and lower intake with the TB still on it and a lot of other 351 parts from a 1990 EB I'm parting out(including a running 351 complete from intake to oil pan) if you're interested.
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Junior User
Joined: Jan 2005
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From: Victoria Canada
Why do I need a new timing cover, does it have clearance issues with the new manifold?
What is the EEC?
According to the wrecker's book, the oil pans are the same between trucks and vans. I am going to pick up the pan, and both intakes this afternoon.
What is the EEC?
According to the wrecker's book, the oil pans are the same between trucks and vans. I am going to pick up the pan, and both intakes this afternoon.
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Joined: Sep 2004
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From: Richfield MN
Kemicalburns when did ford change the assesory brackets to swap from a 302 to a 351 ? when they went to a serpentine belt system ?
I know they didnt swap in the late 60s to 70s been there done that.
Not trying to be a smartie just would nice to have the info for furture fun projects.
I know they didnt swap in the late 60s to 70s been there done that.
Not trying to be a smartie just would nice to have the info for furture fun projects.