all i no is i have to get the LS block bored for the internals to fit, ive already got the internals.... is it worth all the work, theres a couple good machine shops around here and itll be 2-300 to get it bored how i will need it, the LS head i have has titanium valve train already and im going to put some mild cams in it, will this be worth the money? gsr hydro trans with liteweight flywheel and clutch as well will be running with this, should i just keep the stock LS internals until i can afford aftermarket pistons and rods? or bore it out for the gsr's? im kind of into the whole sleeper thing to...thanks for help

 

All b-series (cept b20) have the same 81mm bore, so why do you need to bore the block out? I have gsr pistons in my ls block for my ls/vtec. Plus getting good horsepower out of the b18a/b head will be an uphill battle compared to the b18c/b16.