yes, another carb size thread

[GMC400]

I know I haven't posted much but I've come to the point of asking a question. Last summer I built a 434 small block.

Stock GM Block Bored .030" stroked 4". 9.7:1 compression w/ 0.051" head gaskets (for pump gas). Dart Iron Eagle Platinum 230cc heads, 2.08/1.60 valves. Victor Junior Intake MSD HEI distributor w/MSD 6AL box. Isky Racing Solid Flat Tappet Cam 264/264 Duration @ .050, .588/.588 lift w/ matching Isky lifters. push rods are oversized to head specs. 1 5/8" headers w/3" true duals w/ Flowmaster 40's. Right now it is running an Edelbrock 750cfm Carb tuned somewhat richer w/springs and rods for throttle response.

I am currently using the stock jets that came in the carb. I have the tuning kit for the carb. The only problem is the engine begins cutting out around 5,500-6,000 RPM. Would the jets help this or given the specs would I be better off to step up to an 800-850 cfm? I am getting ready to buy another carburator soon anyway for another engine that will use a 750, so right now the price of a new carb is not a factor. I will also be stepping up to 1 3/4" headers soon w/the same exhaust.

Sorry for the only post (besides the first one) being a question. I've been lurking for a while but haven't had any decent input to add.

Thanks, Joe.