So I am at the point with my '84 of either selling it or really starting to upgrade the performance big time. I am not sure if I would call it a "rare" car but it is an '84 LX Vert 5 speed with the H.O. motor.

My idea for upgrading are changing out the 7.5 rear for a beefed up geared 8.8(staying 4 lug) and possibly doing an engine swap or upgrading the original motor.

The opinions I am looking for are if changing up the rear and doing an engine swap could negatively affect the value down the road. Pics attached of the carName:  stang.jpg
Views: 108
Size:  75.6 KBName:  stang1.jpg
Views: 108
Size:  80.7 KBName:  stang3.jpg
Views: 108
Size:  103.7 KB