Quote Originally Posted by Lefcrak View Post
This may be a little random and I appologize in advance.

I have a 1969 Chevrolet C20 (for parts) and a 1970 C10 long bed that I'm currently restoring / customizing.The 1970 currently has a crate 350 under the hood with a three on the tree. I am considering switching to a 427 would I be better off to stick with the 350 or would it be difficult to switch to a 427 (changing from a small block to a big block). I'm guessing ill have to change the rear end and transmission on the truck to compensate for the 427.

With the 350 I am averaging 3k rpms at 55-65 mph depending on the incline. I'm guessing with the current gearing and what not I would be burning rubber in third gear with a 427.
First & foremost, WELCOME! We're glad to have you here . Working from memory, I believe the only things that change between those motors (as far as getting it into the truck) are the mounts and they're location(s).. As far as which would be better.. that is purely an owner decision. A "hot rodder" will love the torque and horsepower of the big block. But the 350 is no slouch and if it's a new(er) crate motor, then maybe the wiser choice is to stick with it!?!?! Again, that choice is on you. I am not certain that you'd "NEED" to swap tranny and final drive just because of the big block, it would depend on what the truck already has for those parts.

You could also replace the ring and pinion by itself and get your truck into a "more user friendly" range of rpm's. If your not using it as a truck and carrying or towing daily this may be beneficial to your motor and your wallet.

Other guys will be along and offer other opinions, keep an open mind and be honest with yourself and what you want the truck to do and you won't go wrong!