It varies. I'm around 300ish whp with my mods with more in it if I reupgraded some bolt ons and had it tuned. Very safe and the car doesn't have an easy life. 450 horse at the crank is a safe number, much more than that and I would at least realize the potential to split the block is there. How high you turn it is a bigger killer more than anything though.
Oh yeah, the 93s have hypereautic pistons so be wary there. The older ones have forged pistons, and the bottom end will survive as much power as the block will.
my buddies 89 lx runs 10.80 1/4 with the stock block afr 165 tfs stage 1 big mass ported tf intake c4 trans brake and slicks tuned 330 rwhp and a big shot NOS