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Originally Posted by Mr. P-Body
davo,
Any BBC-equipped Camaro will have the mounts and wiring you need to install the 454. You will also need new front springs from a big block Camaro, as the BBC weighs a hundred or so more pounds than the Pontiac and Olds. The TH400 will also need the wiring for the kick-down switch. Handling of the car as a "T/A" will be compromised by the increase in nose weight. Watch out for some of our 461-powered Firebirds. It takes a WHOLE BUNCH of 454 to catch them!
Jim
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WRONG, WRONG, WRONG, WRONG, WRONG, WRONG.
1) The motor mounts are the same just need to flip them over and use the other set of holes that are already in the front crossmember.
2) the trans crossmember wotn fit (but guess what it wont work with a pontiac motor with a th400 either) you will need a universal one, or carefully cut the mounting pade off the trans crossmember which is located on the front side of the crossmember and have it welded onto the backside of the tube. This is best done with the motor and trans in the car. Motor bolted to motor mounts trans supported by floor jack.
3) The stock front springs are fine. My front end sat higher after the swap. Besides by the time you add an alum intake and waterpump and add headers there is the supposed increased weight difference. Plus if you remove the AC that is even more weight off the front end.
4) the handeling of the car will not change much. Due to the fact that the 454 will sit a little further back than the old motor.
5) the kick down on the th400 is no big deal dont really need it hooked up (that is why god invented shifters). A 454 has more than ample power to pass in high gear besides that is why we have shifters.
6) My old 460 (454=.03) with hyd cam and 9.5 compression went 11.8 and still got 13 mpg. In fact my first 454 went 13.0 with an edelbrock performer cam and +100K miles on it.