The coolest things ,about Pontiac ? Everything pre somg was interchangeable. Other than the '66 -'67 valve change angles ( If I remember , correctly...), Engines were designed , to be killer torque monsters. Had a '72 Formula Firebird , that I traded a '69
Stuff a Well designed 455 in it , reconciliation of turbo designed..will make life FUN. Now ,those pesky smog laws.