well i'm not sure what i'm running now to be honest... it was a 350 4 boly main rebuilt a year ago has a 480 lift with 228 duration with double bump heads angled milled to 60cc with 1.94 & 1.60 ,with stock style cast dished pistons std deck height, crane 1.5 rollers rockers with an dual plane airgap intake fed by a carter comp carb,msd hei components, full length ceramic headers with flows...can anyone give me and idea it works well but i'd like it a little better... it pulls alot at 3,000 but lacksin the bottem end a bit....i've wanted to put one on to give me some extra power in the bottom end and midrange.. i looked at the centrifical style but there really pricey... and create more boost than i will probably need...so i was looking at the weiand singe 4 barrel blower but not sure wich one i should use...