I thought that the high point for the SD4 engine was more than 232 HP but the guy that built it should know. While the engine is capable of making this type of horsepower , that INDY engine had a full race cam and was probably not very streetable. Those engines still cost a lot of money and the only advantage that I can see is that it bolts right into a Fiero that had a tech IV Iron Duke. The swaps that I have seen probably make closer to 200HP, not bad but considering the cost the HP per $ ratio doesn't seem great.
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "