I am looking to trade out my 383 for a 421 SB2 set up, bought the motor for 11k here is what the add said.
Professionally built 421c.i SB2 Engine Dart Aluminium block, 4.155x3.875, 14:1CR, 50mm cam ,Chevy Aluminium SB2 heads(211), titanium del west valves Jesel shaft rocker system all Crower rotating assembly, best parts engine is set up for dry sump oiling system and comes with custom aluminium dry sump oil tank and lines and filter, aluminium valve covers with oiling system , never blown and not abused and very little run time since new drop in and your ready dyno reading 869hp and 715fpt @8800 , very smooth and Very Powerful engine with over 20K invested , NO JUNK great engine my loss your gain kinda thing
I'm thinking the numbers are overrated but shure am interrested in getting 700HP@7500k im thinking with the short stroke should be happy in the upper RPM range. Waiting for picks of the bottom end to varify components. Obviously i cant run 14:1 on the street all the time so i will need new pistons to lower it down around 11/11.5:1 but what kind of cam profile do they like? I have some Try-y's for it (hope they will fit) so im thinking a 4/7 swap will be in order but does anyone have expirence with these motors? Any tips to make them more streetable?