ls weakness is rod bolts. and dont rev too high more stroke than a gsr/itr.
and a boost’d d-series is sweet. swap out the head bolts and rod bolts and vitara build shave head and deck to raise comp with vitara and gt3076r nasty setup. need other supporting stuff and d series clutch slips hard
and there have been people who put down over 400whp stock dseries with head bolts and a 3076 just keep a spare block handy and you have a cheap/nice setup for price if you stay with honda
also check out a twin charged d-series somewhere on hondatech
to make over 220-250 you need to have the block fully built. You would be good for up to 350-370 on pump with the stock head … build the head and you would be close to 500