Quote:
Originally posted by Moonduck
Good Ford big blocks would be: 427 (look for 4-bolt mains), 428, 429, and (as a last resort as they weren't that hot) 460. You can go for a 390 big block if you find it, but you would honestly be better served to go for a small block instead of a 390.
Good Chevy big blocks: 389, 427, 454 (Chevy guys, got any others you can suggest?)
Good Ford Small blocks: 289 (I said Hi-Po and will get mor einto that later), 302, 351W, 351C (it has been debated that the 351C is a big block, I disagree, it is however a strong engine no matter how you look at it).
Good Chevy Small blocks: Just about any of them. 283, 327, 350, 383, 402, it doesn't matter really. They're all good properly set up.
And keep us posted! =)
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Nice post. Just a couple corrections on the Chevy stuffs. The 389 is not a Chevy engine....I think it is Pontiac, but I am not totally sure. I do know it isn't Chevy. Chevy did produce the 396 and 402 big blocks. After 1970 all 396s where actually 402s in displacement. The 402 and 396 are the same engine. The small block you are thinking of is the 400 small block, there never was a 402 small block. It is now possible to build up to a 454 small block Chevy, Fel-Pro released a gasket large enough to do it. Last I saw 632 was as large as they are going on street big block Chevys.
Geeza-
In all honesty and I'm not trying to be hatefull in any way. Why are you even considering putting anything but a Ford 427 in a Cobra? A guy near my house built a Cobra and didn't want to fork the cash for the right engine so he used a Chevy small block. It was cheap and easy and propelled the car. But, now he can't show the car in anyway or even take it to a gathering of car guys. He gets so much crap for using the 350 it hurts. If you can afford to build the Cobra at all, wait a little and plunk down the 8 to 10 grand required to build a Cobra engine. Bare minimum, go with a very well built 347 stroker or 408W. An engine worthy of being in a Cobra is going to cost- and I don't mean in a lot of chrome. Chrome is only shiny, it does not make an engine worthy of resting in that engine bay. Please consider waiting and saving a bit to get a really nice engine for the car. I love Chevys, they are all I hotrod, but I woud not want to look into a Cobra and find one.