trying to decide wether i want to run a 351w or 351m like the m alot even though most people do not but all so have 351w from mid to late 70s out of a boat that really puts out some rpms dont know what to choose any thoughts

 

im thinking that the boat motor is designed to make peak numbers at high rpms, so if your not keeping the rpm's up, it might bog down or have no *****. whats the difference between a windsor and a modified?

 

after having many ford engines under my right foot it all comes down to 2 things when picking a engine for a 4500lb truck.

1.cash on hand.

2.what you think is cool

there is not many engines that ford put in trucks with under 300ft lbs of torque hp went from 150-325 so you can pick any v8 you wish(if the tq is already there its easy to tap into the missing hp numbers).

now the real importent question is this!
what transmission and rear axle ratio do i need to run this engine effectively for*enter intended usage here*?

 

for lack of better terms big block or small block (Ya I know those are chebby terms).

351w are also more plentiful if you end up popping it. (most of the 80's some of the 90's in in f-series - bronco's - vans)
351m can be turned back into a 400 if so desired.

I think you might be able to find EFI for the 351w where as you would have to either hunt for aftermarket 351m EFI or rig somthing up. Of course that is if you wanted to go that route. I also think 79 is the last year for the 351m.

The 2 motors require differant motor mounts and trannies so once you pick it you'r kinda stuck. Unless you don't mind another project to swap it over.

 

c6 automatic trans i have one for the m and one also to fit the w iam going to run 2.5 ton millitary axles with a 673 gear ratio and at least a 56in tractor tire s

 

i was thinking about using a 400 cranck and rods going 40 over on the m block then you run into the old overheating thery i no the m is also mcc cast wich were also not so great but it is out of a 78 so i think i will b ok

 

Just get a 502 crate motor

or find a 7.3L diesel. How bout that new 6.3L turbo diesel.

Or if RPM's are a problem how bout a rotery motor. I don't think the red line is untill somewhere near 10K RPMs

I know... I know... You use the stuff kicking around.

 

there still i do have a 7.3l non turbo in a 88 f250 i got kickn around here mayb

 

There you go.

Watch u-tube. diesels seem to do prety well to put out stuck gassers....