I have a 750 alcohol carb on 406 SBC need a idea where to start with jetting running at 4500 to 6500 DA. Thanks

I'd guess #155-165 area with no PV's.
But all depends on carb and engine.
I have had success with an out of the box HP alky carb with #150 jets. 350 SBC, 5000 flash and shift at 6000 and trap 6200. It's a ZZ4 engine.

I run a belt driven pump with a front mounted cell.

Nothing against others using electric pumps with the cell in the rear because they win as well, but I like the belt drive that varies the psi according to RPM of the engine.

Take it for what's worth, it's Free.


Edit: I misread your post. I don't think I've ever raced in that high of DA repeatedly.
I'm usually 500' to 2500'.

I would start on the high side of M120's suggestion but it should be a decent starting point.

Don't see DA that high usually but with 355's I'm at 146 and a friend is at 160. Pretty big difference in our HP and RPM's.

I'm at 148's APD 750 billet, 376 LS motor around 530hp, 6.40's at 2800lbs in 2000-3000 DA, 1200' track elevation.