street/strip 360

yeah i know those 400's can run cause my dad has a 74 firebird with a 400 and hes running low 12's all motor with a full interior on drag radials and the torino keeps saying hes faster just for the reason that my headers are gonna be a pain to put on. so im just waiting til i finish the duster and get it on the road to prove my point to him lol. and all the advise is appreciated. so i think im gonna go with the headers then the intake and 4bbl.