While they can be swapped into Fieros, the early series 1 3800 N/A engines were never very popular swaps . The power increase doesn't justify the 100 hours of labor that its takes to do a typical swap. 140 HP stock Fiero vs 165 HP series 1 An almost direct bolt in 3.4L 93-95 Camaro Firebird V6 engine replacement will give you about the same power.
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" 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, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "