[spawn_x]

Hello Have been reading A LOT. Wanted to ask, since most advice here seems to be for guys going to 5000+ rpm. I have no interest in ever spinning that high. Max shift point will be at 4500, but realistically 4000 MAX.

1973 Grand Prix 455 with a TKX .68 trans, full weight. XL code, which I believe means 8:1 compressionand an 067 cam, and a wideband o2. Idle is around 18" vacuum with vac advance through manifold, and timing set st 35 at 3k rpm. More than 1/3 throttle and Im at 10-11 afr, and WOT its in the 9s. Holly 4780 carb, and an edelbrock intake (unsure which one)

Goals:
Runs on 89 octane
Daily driver, low maintenance
Powerband idle-4500rpm

Ive read a lot into different cams like xe274 and crowers and such, wirh 10.5+ compression shifted at 5200-5400 - this is not the goal, that will give me poor street performance because I will never see such high rpm.

Heads: kre? Not looking for high cfm porting, 10:1 comp max I would guess for 89? what cc would I need? under 240cfm ?
Cam: 068 seems to have what I would want?
Carb: probably sniper efi
exhaust: currently headers with crush bent 2.25", but wanting to get RA manifolds with mandrel 2.5

Appreciate the advice. I will not be drag racing the car, will not be in high RPMs, and do not want to pull the motor our for pistin or rod work. Not interested in a big cam.

Thank you!