[NMattison]

well my block is a d4 {74} block and i also have a d9 block and the d 4 and has a lot more steel in it down on the lower end. i have one of each on the floor right now so u can visually see the difference. also my 351 is stroked to a 392 and im running a 670 cfm street avenger. i have been told this is a good carb for this application Neil