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Build your 240 into a 300. Improve the exhaust flow with EFI exhaust manifolds, drop an Offenhauser 4v intake and a 4v carb. Make it unique! Put an electronic ignition in it and run it! Lots of torque and decent gas mileage!
This is also a good idea. I know a guy that did this to his 300 in his 67 longbed. He says it's very torquey.
They are faster because they're more powerful. Which comes from a bigger displacement. 351 would make for a very strong truck. But don't let power overtake your intelligence.
I have a 351 Cleveland in mine, with a few goodies, and I have yet to want MORE power. But I tow and haul often.
A 302 is a good motor if you're not gonna be doing any towing. 300hp will move the 3800lb truck pretty darn good. Parts are cheap and you can build them ANY way you want them. These trucks had 302s so you won't have any trouble getting it to fit.
More on the C4...
They are very good, very strong transmissions. They perform well in stock form, but with just a shift kit and vacuum modulator adjustment, you can have a quick shifting, tire chirping hot rod transmission.
They don't take much to turn. I think only about 15hp is lost through it. Compared to a C6 and AOD robbing about 40hp to turn.
A floor shifter makes for a very cool setup. The C4 has 6 shift positions. Park, reverse, nuetral, Drive (1-2-3 gears automatically), 2nd gear, and 1st gear. You can hold 1st gear to any speed, then slip the shifter to 2nd and keep on accelerating! This also comes in handy for slowing down if you have manual brakes. You can pull it to low gear and the engine will help slow the truck down faster.
Would you recommend efi or carbeurated? I know efi would be more work but I'm familiar with both.
I know they are more expensive to build because of the small aftermarket
I wouldn't say the aftermarket is small. Ford used the 351W from 1969 all the way into the mid '90's. There is plenty of aftermarket support for these engines and parts are not particularly expensive. The 351C on the other hand, has a much smaller aftermarket and parts tend to be a little more expensive but what a fine engine it is, particularly the 1970 4V version.
I wouldn't say the aftermarket is small. Ford used the 351W from 1969 all the way into the mid '90's. There is plenty of aftermarket support for these engines and parts are not particularly expensive. The 351C on the other hand, has a much smaller aftermarket and parts tend to be a little more expensive but what a fine engine it is, particularly the 1970 4V version.
The auto school I'm at we have a 351 Cleveland running on a stand. Pretty impressive motor but expensive😳
I have nine Cleveland motors. 2v's, 4v boss, 4v cobra jet, 4v HO, and just regular 4V.
I run a 2v in my truck because the smaller ports and lower compression ratio run better on the street and low octane regular gas. But I estimate it's still putting out 350hp.
I have nine Cleveland motors. 2v's, 4v boss, 4v cobra jet, 4v HO, and just regular 4V.
I run a 2v in my truck because the smaller ports and lower compression ratio run better on the street and low octane regular gas. But I estimate it's still putting out 350hp.
My personal theory is that ford didn't want to neuter their high-performance engine with the emissions crap.
The more practical answer is that they felt they didn't need 2 different 351 engines. Windsor and cleveland. And since the windsor used basic small block parts, it would cut production costs.
Nobody knows for sure why. Probably several reasons. In the land of Oz, they made them until 1982. And they had a 302C as well. (Destroked 351 2v, with tighter head chambers).
My personal theory is that ford didn't want to neuter their high-performance engine with the emissions crap.
The more practical answer is that they felt they didn't need 2 different 351 engines. Windsor and cleveland. And since the windsor used basic small block parts, it would cut production costs.
Nobody knows for sure why. Probably several reasons. In the land of Oz, they made them until 1982. And they had a 302C as well. (Destroked 351 2v, with tighter head chambers).
That would make sense, I've heard the 351m was a dog
351M was a destroked 400. 400 was based off a 2v cleveland. It used a taller, wider block to accommodate a 4" stroke. Also, except for the earliest models, the 400 used a big block 429/460 bellhousing pattern.
400 isn't a hot rod, but it makes a workhorse of a truck motor. The dentside/bullnose guys have that going for them.