Want this question answered?
big block to small block. you change the engine mounts position and possibly the trans. but yes.
small block and big block motor mounts are the same, so you should be able to take V8 motor mounts from most any Chevy engine bay.
the big block will bolt right to the small block motor mounts but they do make big block motor mounts that you can buy and install on the 66, it lets the engine sit a little lower and further to the drivers side.
change the motor mounts and get the computer and wiring harness out of the donor car that the small block came out of.
The small plugs, on both sides of the engine block, at the rear edge of the motor mounts. A pita to drain. You have to remove the motor mounts.
no
It sounds like you want to know how to change the engine in a 1970 Chevy truck from a small block to a big block. If that is the case; there is no difference in the mounting of the engine to the transmission or motor mounts. The exhaust system will need to be changed, and the small block radiator might not be big enough to handle the extra heat made by a big block when it's being worked. (such as on a hot day or pulling a heavy load)
I recently built a engine test stand for a 402ci Chevy engine. The distance between the motor mounts is 16 1/2 inches center to center. This should be true for small block and big block engines.
I'm not sure why you'd want to put a small block Chevy in that Pontiac. But some things to keep in mind....most of the engine wiring is on the opposite side. You'll need to change engine mounts on the frame and you'll also have to make sure to get a Chevy transmission as the B.O.P.C trannys won't bolt to a Chevy.
NO. Not even close.
It should be fairly straightforward if you put a set of v8 mounts on the engine and drop it in to the engine bay. Hook it up to the transmission, level the rocker covers, and mark the holes for the mounts. Then you can take the engine back out, install the mounts, and reinstall the engine. That year was available with a v8, so you should be able to use factory accessory brackets.
Yes - mine originally had a small block 350 and now has a big block 454. Isn't that difficult, with a few modifications of course (engine mounts, front springs, etc) *Skylla*