my 400 6.6

[1978FORD]

just some pics of my 1978 ford f-250's engine

 

[whitetrash21]

big chunk of steel there...... i love old tech.

 

[big block 88]

Ahh.. The good ole days when chevy dodge and ford all made good trucks that ran for ten years and then some. They need to bring back the big iron.

 

[1978FORD]

Yeah I love it's a work in progress

 

[Acesneights1]

Make sure you use a good high pressure oil pump. Not high volume, high pressure. Engine needs min of 50-75 psi IIRC.Melling make a high vol one that doesn't put out a enough pressure. The lower end on these Clevland Mods were weak. Just my experience. I rebuilt many many of them. Upside is the heads breathe very well even the 2v heads. A 4bbl intake gives it a nice boost.

 

[Acesneights1]

Here's my late 77(same as 78 early 77 was totally different.) It had a 400m.

 

[woodchuck2]

I have owned several of them, like said the bottom ends are weak. Ah hell the whole engine IMO is weak. They are tough as they will take a beating but all the small blocks and FE's i have owned would out perform the M engine hands down. Another tough engine that i hate is the ole 300 six, tough as nails but for the power and gas milage i would rather have the 302/351W.

 

[Ratman]

Another tough engine that i hate is the ole 300 six, tough as nails but for the power and gas milage i would rather have the 302/351W.

I dunno, I worked with a guy that had a nicely built 300 six, -and the thing ran like a scalded cat.

I also had one in my work truck back in the early 90's, -the dang thing got ABUSED daily, -and had well over 400k on it.

The only downside on my ol' '84 f-150 was that it would go through ignition modules like clockwork, -and I always kept a spare in the glovebox!!

That was a great old truck, -it would trash front tires with the twin-beam front end (typical for f-series trucks of that era). Aside from the ignition modules going out, that ol' truck just wouldn't quit!

You're right about the mileage, -neither one of my 300's did well on fuel, -but with the torquiness they have, they sure were fun to drive.

 

[2141pete]

Make sure you use a good high pressure oil pump. Not high volume, high pressure. Engine needs min of 50-75 psi IIRC.Melling make a high vol one that doesn't put out a enough pressure. The lower end on these Clevland Mods were weak. Just my experience. I rebuilt many many of them. Upside is the heads breathe very well even the 2v heads. A 4bbl intake gives it a nice boost.

Good info. Kinda late to bring this back up but I love the 400's and 351 M's. I've owned 4 in the past and built all of them myself. To extend rod bearing life you can also have the oil serts in the mains drilled and a bigger one welded in and resurfaced. I believe they say that exteds the life of the main bearings in the 400's by alot.

 

[M123KT-450]

I know of 2 "M" fords that have well over 200K miles and running strong both of which kicked the Dog piss out of my 351W.

But i ain't shorting the 351W at all tho that 351W Trashed many 302's ! That motor was still running strong after that useless E40D puked at 155K miles, but i wasn't going to drop any more into that truck so when the trans went it got replaced by the GMC K2500 diesel. ... .

My lil'Brother has that 351W EFI stuffed into his GT stang and he's been putting the smack down on some ricers on the ave. .

Mike

 

[Acesneights1]

If I did it all again a bigblock is the way to go. 460 bolt to same bellhousing as M . Can't remember the name of the company but was in the back of most 4x4 mags that sold conversion motor/alt braket mounts to drop a 460 in place of a 351/400m. Was my biggest regret with the truck show in my other post. Puked atleast 4 "M" motors in that truck. Only good thing was at the time they were abundant and cheap. don't know why I never just did the 460 swap. I had it in my head back then keeping everything factory was better.Not. Course now I'd build that same exact truck again but make a powerstroke fit. If i could only win that damn lottery...