There are a couple of guys on this forum that sell mounts/brackets for the 4T65eHD trans. One type uses a bracket that uses stock Fiero mounts the other type that most of us use is a complete mount and bracket set. You can find them in the mall. In addition West Coast Fiero also sells custom mounts as well but delivery can vary during the busy summer car season.
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "