Yea i know everyone is going to say why drop the six it is a great motor, blah, blah. Yea i love them all 3 of my trucks had them and great low end power and indestructible, but i gots to have lots 'o' power. I Like to have the top end too. So what years 351w will work and bolt up to my 4 speed manual tranny. I would rather stick with the carb and get rid of the feedback carb like on my 6. Anything i should watch out for also. I plan on building the six up so it has power after i swap them out but for right now i want cheap power. Plus i like bothering the local police

 

get a 84 to 87 351W from a truck. they are High output (HO), it'll have a 4bbl, and a slightly lopy idle. about 210HP, 300+ foot lbs of torque.

a 351W (W not M), will bolt up to your tranny, you need need to get a 351W flywheel as most 302 flywheels aren't balanced correctly for a 351W.

also pull the motor mounts off of the frame behind the crossmember (they are rivoted on), you'll need to bolt they to your current crossmember, and remove both of the 300 motor mounts, and drop it in.

 

But won't that have all the computer crap like my straight six. and if it does can i rip it off and convert it to the duraspark without a prob. also 84 to 87 are the only years that will work. Bronco or truck?

 

nope. all the 351W HOs i've seen are regular duraspark II..

84 is the first year for the 4bbl HO (I believe the 351M was the standard 351 for 80-83). anything over 87 will be fuel injected.

you can convert them just like the sixes, but i don't think they ever had the EEC-IV. my 85 doesn't, and neither does my cousin's 85. Bronco and truck should be the same.

 

cool thanks for the help......now all i have to do is find a well running one for sale.

 

What is the difference between 351w, m, and c? Sorry for the dumb question, but I'm new to this...

 

The 351W (w is for windsor) shares the 231,255,300,289,302 bellhousing, and the internals are similar to the 289/302, but it is a good deal beefers (bigger mains etc). Most bolts on 302 performance mods work with the 351W, and 351W specific parts are pretty cheap since a lot of mustang guys uses 351Ws now. this is a fairly popular truck motor ('83+ years), and came in bunch of 70s cars.

The 351M (m is for modified) shares the big block bellhousing (429/460), and shares a similar block with the 400M. Its aftermarket/hop up support is pretty slim compared to a windsor.
this motor was put in a lot of late 70s trucks, early 80s F250s, and some late 70s thunderbirds. IMHO, it is kinda a performance turd compared to a 351W or 400M.

the 351C (c is for cleveland), is a whole different kind of animal. there are 2 versions, a 4V & 2V (ie 4bbl & 2bbl). the 4V version has huge valves, and aren't really good unless you rev high (3500+ rpms). the 2V versions have smaller valves, and are generally better for non-full-out-race-apps. it has a small block (windsor type) bellhousing. no 351C ever made it into a production truck (that i know of) but you could swap them. the 4V model mostly made it into Boss mustangs and ford panteras, whereas the 2V came it a bunch of cars. however, they are rarer and a little more $$$.

 

just bought my 351 from the junkyard got it for 200 bones...they gave their fav customer a discount....anyways does it matter that the duraspark box is from an auto. also will i need to use the flexplate that is on that 351 to bolt up to my new process 4 speed and will i be able to retain my 4.9 starter....thanks for all the help....i can't wait to go out and raise some hell with the local police......

 

man am i stupid.....never mind the flexplate question....i will just buy a new flywheel from the parts store but will my cluth work on that flywheel...not sure wheather it is 10 or 11 inch but i just put in a new one....also will i have to modify the crank for the pilot bearing....i am 98 % positive this truck had an auto.....i will know for sure wednesday because i am picking it up then and i am going to go grab the DSII wiring and maybe the motor mount towers..... i don't think i could be more excited unless i was getting a brand new super duty with a power stroke motor upgraded and making a 1000 ft/lbs of torque....lol

 

74F250, I preformed the same swap with my 83 F100, it's a straight forward swap, yes you need a flywheel for a 351w, the 302 ones from 82 up are different, best thing to do is grab the wiring harness off of the motor, that way it is the easiest to swap over, do you have a factory tach? if so the wiring harness will also help with calibrating the tach, if you do a search on the 6 cyl forum, you will find my pics when I did my 6-8 swap, in the mount difference, and such

 

will that wiring harness plug directly into the firewall harness plug or do i need to do something else....also in your other post it says you were able to use your straight six alt? did you have to change anything ? i am not worried about the power steering to much because i am going to put on a saginaw pump......also do you have to drill that backside of the crank out for the pilot bearing to ride or is the hole already there. thanks for the help....

 

there is a plug on the drivers side fender that powers the coil and also is for your oil pressure and water temp sender, it should be a 4 blade and a 2 blade plug, on the 2 blade, dk green/yellow, and black, and on the 4 blade, red/white, white/red, red/yellow, and black if I remember, then there is a 3 pin plug for your DS2, which you will have to convert to, a purple, a orange, and a black,

for the alternator, no I didn't change a thing, it just bolted right in, I'm also using a big cased alternator out of an 89 taurus/sable (100A)


as for the pilot bearing, there is already a hole in the back of the crank to put the bearing into, the truch that I got the engine out of, was an auto, and it had the holw for the bushing there, all I had to do was install it

 

"bremen242" we down here in australia were pretty lucky and got the 351c 4V in our effies from about 76 onwards i think(may be out by a year or two) but that was only because they we're producing clevlands at the time here in australia however the downside is that the only six in our lineup was a 250ci 4.1L out of our falcon sedans not the best for a full size truck!

Aaron,

 

I started to do this swap about 5 years ago with a 302, and found that the radiator for the I-6 was bass-ackwards from the v-8 setup. The inlet and outlet were on opposite sides.

I didn't finish the swap once I got the 302 out of the wrecked sedan, and found out why the engine was so cheap (broken crank).

 

monaro-

that is cool; I guess aussie fords are all about the clevelands