hi all.i have an 86 F150 4x4 w/ a carbed 300 6 and NP435 granny 4 speed trans.this truck is rough.i will use it for for work and play so im not worried about cosmetics.what i would like to know though is this:will a 302 or 351 bolt right up to my 6 cylinder trans? will the clutch and pressure plate work?the boy i got it from claims the clutch and pressure plate are new,i'll see when i crack it open.the main reason for these questions is since the 300 is shot (mains hammering,leaking serious oil and smoking like an over loaded freight train) i am doing this on a budget and if any of three 3 engines will work i will have more options to find the best deal on a clean good running used engine.jim

 

you have an awesome combo there. I wouldnt bother with a 302 as its not much of an upgrade. the 351w would be though and give noticable performance gains. the tranny will bolt up to either motor but clutch/pressure plate wont. The 300-6 was and is a great motor that in my opinnion will outlast any of the v8's your looking at. not to mention there are some performance upgrades to really wake up the motor and keep it reliable. mpg is great with this motor compared to the v8's as well in carbed form.

 

How much of a budget?

I'd go with a 351. With a couple of mods it will run circles around a 300.

 

huh I dunno bout that, the budget part that is. In order to go from a 300 to a 302 or 351W you have to go to a junkyard and pick up frame blocks. The problem with that is you have to find a Bronco or a F-150 with a 302 or a 351W in it. Although the problem with that is that you have to grind off 4 rivits to get the driver side frame block out, and then you have to grind off the rivits on your truck were the blocks go so they sit flush just like if it came form the factory like that. Then as a good measure take a welder and weld in were the rivits were and on the bottom of the block. Because the rivits are responsible for holdong togeather the front supppention portion of the TTB/IFS that Ford is famous for.

And flywheels.....look at a thred called "Flywheel" under "Engine swaps" under "Performance, Engines, and Trubleshooting" and there I have explaned about the tooth count, bellhousing, flywheel weights.

Or if you don't want to look it up (I segest looking it up because it has more info then just my 2 cents) here are the posts I posted relating to the flywheel:

"You have to go with whatever tooth count that your bellhousing/ starter bolt pattern is designed for unless you want to get a new bellhousing that would fit.
Example:164 tooth flywheel and a starter designed for a 164 tooth with a 164 tooth bell housing and you got a runner.
If you put a 157 tooth flywheel in a bellhousing ment for a 164 tooth flywheel and use a starter for either a 157 or a 164 tooth flywheel, you'll be having to tearing it all apart to replace the flywheel with the right amout of teeth."

"The 302 and 351W need, depending on the year, either a 28oz weight or a 50oz weight."

Hope it helps!!

 

302 is 50oz

351w is 28oz

 

302 is 28oz prior to 1981-1982, 50oz after...

 

After owning both a 300/6 and a 5.8L, I liked both but in you case, I'd opt for a new straight 6.

 

i would really like to do the fresh straight 6 too,im trying to do a fast swap using a local online want ad so i can keep the price down some and it seems there are by far more 302's out here then straight 6's.now someone said earlier that there is two different flywheels,starters and bellhousings for the 302.i have an 86,with a 302,T18 and 9 inch rear and an 86 with 300 6,NP435 and 8.8 rear.when i was at the auto parts store yesterday picking up a new clutch master cylinder and gas line for my jeep,i picked up a starter for my 302 powered F150 and had him cross reference the starter to the 300 6 and he said its the same starter.now i could be wrong and correct me if i am,it sounds from this,that if i used a 302 from the around the year of my trucks i the v-8 flywheel and starter should work with my 6 cylinder bellhousing ok.i will continue looking for a 300 but im just checking options.

 

As long as you use a flywheel with the same number of teeth as the one you're replacing you've got no worries.

 

300-6,302,351w all use same bellhousing. there is a difference between a starter for these rigs in regards to being bolted to a manual or auto tranny. so if your sticking with a manual setup then yes your starter should work for all 3 engines.

curious, whats a 300-6 run from your local pick N pull? most of those motors at least come with a 30 or 90 day warranty which is far better then what a private seller can offer.

 

I'm with most of the others on here. Keep it a 300. If you look around you can find a 300 to freshen up before you even take your apart. 300s low RPM torque more around the weight of a truck so much better than 302.
351s tend to have a drinking problem.

 

I sugest looking for a 300 on Creagslist or get a junk yard specal. Creagslist, I've found that you can get lots of things for dirt chep on things that other places would cost you you left nut for.

 

I'd pull and rebuild the 300 I had. Line it all up parts and machine shop wise, and you can turn it around pretty quick. You may have to borrow or rent wheels for a week, but you will know what you have, and you'll be more likely to be doing this exactly once....

 

my vote is for a.....393 stroker.

 

i wouldnt have to rent or borrow wheels,between the wrangler,the other F150 and the minivan,i just have so many projects and not enough room in the shop,so i was just thinking in and out as fast as possible but.....looks like i may go a different route here.i just accidently ended up with another F150 4x4 (yes it was an accident,and dont tell the wife any different lol).my step son got to hurting for cash and was going to haul his f150 shortbed 4x4 to a scrapyard for fast cash....so i bought it.....to help him out...anyway it has a 302 and 4 speed combo and its only real issues is it isnt charging the battery and needs the tail/brakelights fixed...so.....i might just give it alittle tlc,use it and sell the one this thread started about.(dont have room for 3 of em)