Yes it is, the nova is also useable in the camaro or firebird,I put a 73 nova subframe under my 68 camaro.
There were reportedly 7,199 Z28s sold in 1968.
About the only emissions equipment on a 68 was a pcv valve.
Pontiac uses same block no small or big, Chevy describes their engines small or big
2.14:1
The biggest concern here is the alternator/voltage regulator design. The 68 is external while the 78 has it built into the alternator. There are websites that explain how to do this. The only other real issue is the coil. The HEI needs more voltage than the small wire running to the external type coil of a 68.
What exactly are you needing to know? I have a 68 Firebird sitting in the driveway. Are you needing to know colors of wires on the exterior bulbs or routing etc for the interior?
this being an opinionated question theres no incorrect answer but my opinion is both the 1967-69 camaros as well as the 67-68 firebirds
I'm sure you can. You would be better off with a 455 Pontiac. You can bore and stroke it to 468ci.
68-69 leaf springs from the Camaro, Firebird, and Nova I believe are all the same. It seems that maybe the Apollo and all those cars based on that Nova platform will work. I know for sure the Camaro and Firebird are interchangeable. The X-body platform....I'm not 100% sure of.
Union 76 Unax AW-WR ISO-68 or Union 76 Firebird Tractor Hydraulic Luid (Re-Refined) Union 76 Unax AW-WR ISO-68 or Union 76 Firebird Tractor Hydraulic Luid (Re-Refined)
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.
Pontiacs did not have "big" or "small" blocks. Your '68 could have come with a 350 or a 400 cubic inch motor.