What size carburetor would you recommend for an sbc 383 making about 400 hp Currently you have an edelbrock 600 cfm with electric choke don't think it's enough?

Answer I HAVE A 381 STROKER IN MY TRUCK AND I TRYED A 670 HOLLY AND IT WAS NOT ENOUGH I HAD TO AJUST ON IT ALL THE TIME ,I WENT TO A 750 EDELBROCK AND IT RUNS GREAT.750cfm, vacuum secondaries. also add an additional vacuum canister. you will not have brakes under hard accelleration if you have power brakes. the 383 is notorious for not creating normal vacuum. Answerdefinetely Edelbrock 750 cfm carb

If it were me i would get rid of the junk edelbrock carb and get a good 670 cfm holley street avenger carb that's more than enough carb for a sb 383 up to 550 hp