i just finished my 72 340,9.5 to 1, an air gap, 670 holley street avenger,comp 270h, headers, tci sizzler tc, 727w/shift kit and 3.23 sure grip it all sits in a 72 dart. the onlyclearence issues i had were the cheap hedman headers. and what can isay the car gets upand moves if i can get traction and i still have ignition troubles. by the way i run 93 octane
