Typically when u raise up carb mm's up you need to lower your head cc's to raise cranking pressure, remember ever cc is 10 pounds ( psi) , if I was you , send your head out an have it cut, squish band correction, u will feel the difference, try Dennis at flotek performance , he's great to deal with. You can go with a duncan power head but it costs abt 250 , 100.00 just for the dome, special size.., so send stock head out. Just my .02 .