Up to tdp and get a sr217
well i've got a good standard sr with a hks head gasket, hks cams and have a 2871r and got 400hp.
get them to check the crank and give you bearings to suit, either hone or over bore which ever you want to do, deck the block and skim the head reseat the valves and new stem oil seals. then you should be mint
did you conpression test it yet lad?