car stalls on hard accel

my 2 bbl 318 is doing that now that I put on my headers and dual exhaust. Does the factory '68 2bbl have the capability of adjusting the accelerator pump? I just need to put my 360 in there! Still need a carb, distributor, radiator, fuel pump... every time I add it up seems like I'm still thousands of dollars away :( At least the exhaust is done now!