A 280Z, huh? Cool! Anti-Rice!
Unfortunately, those stock manifolds are going to really limit your cam choices. Can you run the GTO/2nd gen. Firebird RA manifolds? Those would be much much much better than plain old log manifolds.
If you are stuck with plain manifolds, make sure the cam has at least a 112 lobe separation and 10 more degrees duration on the exhaust side. I'd not go over 220 duration @ .050" either. The factory 068 grind would be a good choice for such an engine.
__________________
----------------------------
'72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car!
'73 Firebird 350/4-speed Black on Black, mix & match.
|