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Old 05-05-2013, 12:21 AM
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The 1970 to 1972 Camaro came with a 402 (396) cid big block. It is the same motor and same car.
Chevelle/Camaro oil pan 69 72 Chevelle engine mounts and frame stands
70-72 Camaro big block engine mounts and frame stands and radiator fan shroud and water pump/ power steering pump/brackets.

The 1980 Firebird Trans AM shaker scoop will not fit on a Big block chev without modification. The Edelbrock Torker II 2 O intake manifold is the only oval port manifold that fits. It fits but its not a great intake manifold. But it works.
The GM LS-6 flatty Square port aluminum intake manifold (low rise version) fits
The high rise Ls6 intake does not.

The OEM stock flatty Qjet cast iron 402 454 intake fits.

Anything else requires a hood scoop or modify the T/A Shaker scoop. (Performer RPM intake etc etc.)

1968 to 1972 Chevelle 70 to 72 Camaro headers fit.

The OEM GM big block 14x3 open element air cleaner from a 60's era Camaro/Chevelle/Vette allows the most hood clearance.
It is 1" lower than anything else. "L-88" L-72 427 air cleaner. Its all in the base.

assemble the engine (with all front accessories and fan and pulleys), transmission with mount , chev 70-72 camaro or 69-72 Chevelle BBC engine mounts and frame stands all together and mock up on the frame in the car with a chevy tansmission mount on the cross memember. Move the cross memeber for aft as required.
Check header fit to chassis, correct engine for aft position and level right to left. The engine will sit 1" offset to the right (passenger side) , in the engine bay Check header fit and fan/fan shroud fit power steering pump to steering box fit and engine level left right. The engine will not be level for aft. The engine does not sit on the exact center line of the car, in the body.
The firebird fan shroud does not fit. The 70-72 camaro fan shroud does... A Chevelle fan shroud can be modded to fit.
When you get the assembly and mounts in the right spot on the frame, then you can drill the new bolt holes for the frame/engine mounts stands. (I welded mine in) On some Firebirds the Chevy engine mount bolt holes are already there on the frame.
If when you mock the whole thing up and the power steering pump pulley hits the bolt on the steering box raise the whole engine a bit by shimming under each the frame tabs on the frame to just raise the engine a bit as required with big 1/8th" washers. Make sure the headers clear the backs of the lower A arms.
Only raise up the engine a bit if required as you want Hood clearance.
Get the transmission square in the body, on the trans mount so the engine and trans are not cockeyed.
The whole engine and trans assembley does not sit exactly in the center of the body, but is square in the body.
It sits approx 1" offset to the passenger side of the whole body of the car.
Get the engine level right to left on the frame and square in the car.

When you get the whole assembly fitted and squared up on the frame, tack weld the frame tabs onto the frame.
Then remove the engine assembly and either weld the frame tabs in or drill holes for bolts.
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