Thread: Lincoln 400 vs. Ford 351

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I read that the 400 and 351 are based on the same block, but the 400 usually has the big block bellhousing. My question is are the motor mounts the same from the 400 to the 351. I can get a 400 motor but I want to know if I can use a bolt in motor mount for a 351.
Thanks,
CHAZ

Chaz, if you're talking 351M, it's the same basic block as the 400 and the 400 is an easy interchange. If it's a 351W, it's not. Hope this helps.

OK, I was a little confused, now I am really confused! So the 400 block mounting is the same as a 351M. I guess I didn't realize there were two 351 blocks.
Thanks,
CHAZ

Actually there were 3 351 blocks. The 351 Windsor, the 351 Cleveland (1970-73) and the 351 M. The 351M is the same block as the 400. The Windsor and the early cleveland used the mounts that were the same as the 302 and a bellhousing that was the same as the 302. The 351M and the 400 use the big block bellhousing and they have the same mounts as each other. If you really want to get confused, the FE series (352-427) had totally different mounts and bellhousings than any other series. Makes engine swapping a lot more difficult than on Cheebies.

Yeah, there is a 351 W (Windsor) and a 351 M (some people say the M stands for Modified, but I remember seeing once that it stands for something else.) Very little performance stuff out there for the 351 M and it's sister engine, the 400. They were generally used in luxury or full sized sedans.

Don


Sorry Duane, we were typing at the same time.................

No problem, Don. At least we got the info across. And your right about the 351M/400. You can get cams and intakes and that's about it, although in the latest Hot Rod Magazine there was an article about slightly stroking a 400 and hopping it up. They got over 500 HP and 500 lbft of torque out of it.

the 351c, 351m, and the 400 were all in the "335" engine family. the 400 is the 351m with a 1/2" longer stroke. i think it's actually 402 or 403 cubes. it's good for trucks because that gets you more low-end torque but sacrifices horsepower on the top end.

my dad has one in his '78 3/4 ton. we put a new 280-300hp engine in it about 4 years ago, but even the stock motor had good torque. they sure love gas, though, and he has to run premium it it to keep it from knocking. i wouldn't recommend that motor if you had other options.

Well, Andy, you can call the 351 Cleveland a 335 block and it does share the same design, however it uses the windsor deck height, windsor motor mounts, windsor bellhousing. It was only produced from 1970 to 1973. Made a performance boost when I put one in my 78 Merc Monarch with 4 speed.

i'd reccomend staying away from a 400, they really dont have a lot of power, expensive to get a lot of power out of them and very expensive to keep your gas tank full, they get terrible mileage and need premium.....

Originally Posted by Oldf100fordman

Actually there were 3 351 blocks. The 351 Windsor, the 351 Cleveland (1970-73) and the 351 M. The 351M is the same block as the 400. The Windsor and the early cleveland used the mounts that were the same as the 302 and a bellhousing that was the same as the 302. The 351M and the 400 use the big block bellhousing and they have the same mounts as each other. If you really want to get confused, the FE series (352-427) had totally different mounts and bellhousings than any other series. Makes engine swapping a lot more difficult than on Cheebies.

technically there are 4 351ci ford V8 engines. all had a 4" bore and 3.50" stroke.

1: the 351w(the second 351ci V8)

2: the 351c(the third 351ci V8)

3: the 351m(the fourth 351ci V8)

4: the 352fe(the first 351ci V8)

and actually all displace 352ci, but when fron brought out the 351w in 1969, they called it a 351 to avoid confusion with the 352fe big block.

thesals, the 400 is a good platform to build a decent engine with. cams are the same as the 351c, as are the heads. in fact hot rod magazine built a 400 a few years ago that made 385hp iirc, and mounds of torque. cost? about $2000.

., m is for midland

I'm running a warmed over 400 (402 actual, bored .040 making it a 410) in my '53, there are pics of it in my gallery. I get better mileage with the modded 410 than I do with my stock 400 in my '79 F-350. If I had the money, I would have TMeyer build me a 434 stroker. Here that puppy roar on the dyno...

http://www.tmeyerinc.com/400stroker.html

not to sound dum...... but i herd of a 351cj? i seen thes motors on craigs list but ive never herd of them befor...... is that a real motor?

There is a CJ but as far as I know it's not a 351in any form, sounds like some body is try anything to sell it. As far as getting High performance parts for the 335 engines, there is alot more stuff then people know about. You can buy after market cranks, rods and pistons all day long. Intake you have some good choices to and if you can't a 302 boss intake or a cleveland intake then get spacers and mount that on a 351m or 400m motor.
You can also buy longer and stronger push rods, for the tall decks of the 351m and 400m. Everything else from a cleveland should interchange between the motors. Kurt

Originally Posted by nates66fordf100

not to sound dum...... but i herd of a 351cj? i seen thes motors on craigs list but ive never herd of them befor...... is that a real motor?

Hijacked from www.wikipedia.com
"Q-code (Cobra-Jet)
The Q-code "351 Cobra Jet" version was produced from May 1971 through the 1974 model year. It was a low-compression design that included open-chamber "4V" heads, a special intake manifold, special hi-lift long duration hydraulic camshaft, special valve springs and dampers, a 750 CFM 4300-D Motorcraft Carburetor, dual-point distributor, and 4-bolt main bearing caps. It was rated at 280BHP for all 1971 applications; 266 hp (198 kW) (SAE net) for 1972 when installed in the Mustang and 248 hp in the Ford Torino and Mercury Montego. The horsepower rating dropped in 1973 to 246 hp for the 4-barrel for the intermediate Fords, and still retained the higher 266 hp rating in the Mustang. The 351 CJ (now referred to simply as the "351 4V") was rated at 255 hp in 1974 and was only installed in the Ford Torino, Mercury Montego and the Mercury Cougar."