carb size for 512 stroker?

JamesRR said
400 low deck block. 512 stroker kit from 440 source. 9.5:1 compression. Hydraulic Roller cam somewhere around .630 lift. Will post duration when I find the cam card. Holly 750 with edelbrock air gap intake. Heads are the stealth heads from 440 source. MSD everything. tti 2" headers. timing set at 15 initial 35 all in by 2500. 3.55 hears soon to be swapped for 4.10s. 3500 stall. Engine is painted light blue.

What is an Edelbrock air gap for a 400 block? Single plane, dual plane? Have you a part number? You should have at least 20 degrees initial, and on he dyno runs we have posted we are using 39 degrees total on 91 Octane from the Stinker station.

JamesRR said
Are there any roller cams that in production out there that arent "bad"

Your roller cam isn't bad. It will be good for 6000 rpm and 600+ horsepower and can make 625+ lb-ft at or around 3500 rpm.

There are no bad roller cams out there, just mis-used ones. What valve springs are you running on the cam? Who's lifters are you using (part #?) and what do they recommend for pre-load? What pre-load are you using? What is your oil pressure at rpm?

JamesRR said
Seemingly my current set up just quits at 4,500 or so :(

Your stock Stealth head flow will limit you to a horsepower peak at about 4400 rpm with a 512ci engine.