It seems like whenever I see a used engine advertised it always says "only 50,00 miles on it". When I purchase a used engine I want to see the car that it came out of so I can check the OD. If not I do a cylinder leak down test. If you are shooting for a fast 1/4 mile the 3800SC is the ticket. If you want to retain the look , sound and get a bit more power the 3.4L is a nice upgrade but with the Fiero intake top end power will suffer.
" 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 "