Welcome to the madness! You'll find the LT5 responds very, VERY well to mods that increase air flow, i.e., porting, headers, X-pipes, etc. (up to 430+ rwhp is available for a fully ported and headers and tuned LT5: the "510" package which is become common place with a stock bottom LT5 with porting and headers and yet stock cams!)
You'll need to set aside a few $$ for a tune, or a "canned" (chip) e.g., one from Marc Haibeck or Corry Henderson. And, you might wanna ask whether the injectors have been upgraded to alcohol tolerant ones. (Pre-93s were susceptible to the insulation of the internal coil wiring dissolving and the windings shorting out.)
FIC has new stainless injectors in a kit with the needed gaskets, or you can contact Jerry's Gaskets to buy the gaskets and then Summit Racing for the Acell 150821s (it requires 16 of them).
Just a thought, but you might want to drive it for a while before installing after-market bolt-ons.
Even in stock trim, it will blow the doors off your 73...ask me how I know!
