Im not sure about the 302 Boss or the 429 Boss but the 351 Boss came with a cast nodular iron crank , same as the regular 351C except ones that had higher nodularity were put in the 351 Boss's. Now the Boss rods and pistons on the other hand were forged.

 

The 351W or "Wheezer" had the SB ford head configuration and therefor the name "Wheezer" for breathing problems. A popular swap was to replace the heads with modified 351C/M, or 400 heads top make a "Cleavor". There are many aftermarket head manufacturers that produce heads for the 351W. IMO I don't see huge improvements over the Clevor setup. The basic 351C head in either the 2V or 4V version was so good from the factory that no market developed. The 351M and 400 heads are very similar to the 351C 2V head. The 351C 4V head flowed too well for efficient street use.

None of the 351 size engines are known for strong torque due to their short stroke. The 400 with a longer 4" stroke and long rods produced excellent torque. The 1971 400's were torque monsters!

 

Eric, I would not say that again the cleveland is a hoss. Taht thing will move my stang off the line like no other....well not MY stang, seeingas how mine is in MANY MANY pieces....but a similiarly equiped stang.

 

"None of the 351 size engines are known for strong torque due to their short stroke."
I got a 351M in an 1981 F350 dually and that will put you back in the seat. I'd say they have plenty of torque. I'll say the 1971 400 has plenty of power for it being stock. I got one in a 1971 LTD convertible that really hauls for a 4400lb car. How hard is it to swap the 351M heads onto a 351W? I didn't think that you could do that.

 

You have modify the coolant passages to make the 351M/351C heads work on a wheezer.

 

yes but how... I imagine you would have to cut into any water port on the end, but how much coolant does the intake require and how much flow....

302s also have a crossover that links to the intake... not exactly something you can just put on a cylinder head...

 

The 351C/W produce HP and depending upon gearing they can set you back in the seat. The HP is produced at higher RPMs. Check out the HP and torque curves for those engines. It does not really make a difference what build they have the same characteristics are present.

There are instructions all over the net on how to make the Clevor motor modifications.

 

That's me. I'm using a custom cut Eagle stroker crank for a 351W. It has a 4" stroke but has much smaller counter wieghts than the 400, plus it is forged. Mains are a little under 3" and the rod journels are 2.1".

--J

 

"coolmint the 351 cleveland has nothing over the 351 windsor."

Have you ever heard of a Clevor? A Windsor engine with Cleveland heads? Why would anybody do any such thing unless there a gain to be made.

"and a large block, not really saying it's a bad motor."

Who told you that a Cleveland is a large block? You really should learn about things before you post.

Build your Windsor, and I will build a 335 that will roast your Windsor for less money. Please learn what you are talking about before you talk.

 

Cleveland block is NOT significantly larger than a 351W. In fact, with a 9.2" deck height, the block is somewhat smaller except in length. Overall demensions of a complete W v. C are very close. It is the splayed valve heads that make a Clevo look so big but if you have to put a "Chevy" inspired tag on it, then it is just as much a small block as any Windsor.

Well, at least you're familiar enough with the 351M/400 to know that is the proper name for each. I've met many owners of 400's that call them 400M's!

--J

 

guess i wil just shut up. there are so many disagreements.

it's get what you want and be happy, i guess.

i saw they sell clevelands heads on ebay for the 351 windsor.

is confusing to me. i just remember in the old days the cleveland looked a lot larger.

still would like to find someone that can decipher the forged letters on the block past

the first 3

 

Hi there, especially my friend scroob, maybe I'm a pain in the you know what, but I'm new here and just want to learn and make the best out of my truck. In a different topic in the forum you told me that in order to put in a 400 I should change the entire tranny; can the bell housing be replaced alone and keep the C-6 I've got?. Well let me tell you, I have driven the 351M in a 1978 A/T Bronco whose owner removed the 4x4 to get more speed and mpgs. It really knocked my socks off, power and torque were great and people in the street in other cars just looked as if we were driving a true monster!, that was nice. I take it then that the 400 would be about the same but only better, right? As you well know I am trying to decide between the 351W and the 400 since I can get either of those cheap. Well, the only thing that bothers me about the 400 is the MPGs' question; is there a way to overcome this minor problem? (actually it is a major problem to me!). They say (I know, chevy style comments...) that the 400 is no revver and wouldn't be good for my 3-speed C-6 A/T, but if you can prove to me, given that you're the foremost 400 expert in the forum, that a 400 can consume about as much yet perform way better that the 351W, I might even want to take your advice and put one under my Bronco's hood! thanks dude...

 

The C-6 transmission is a one piece casting. No, you cannot remove the bellhousing. Thus, you can't put a 400 engine in your truck without changing the tranny. Thus, all the other questions are irrelevant.

 

Cleveland motors look so much bigger because the heads are larger due to the canted valve design.

What letters cast into the block are you looking to decode? The most important ones are the casting codes & the date codes.

 

calazo, you are crazy if you think a 351w is better for performance than a 400. But if you want better gas mileage its the way to go.

Engine sizes!!!!

http://classictruckshop.com/engine_sizes.asp


And yes I know the 351c wasn't in trucks!