[TcmaBoy]

The MK III ran from 86.5-92. There was a revision in 89 that includes a new front valance, some electrical changes, and a new front sub-frame. You can swap from 7MGE (non turbo) to 7MGTE (turbo engine) is fairly easy, but it is easier to buy a turbo model to begin with. The 7MGTE is prone to head gasket failure, so installing a metal head gasket is a must. Other engines such as the 2JZGTE from the MKIV Supra or the 1UZ V8 from the 400 series Lexus cars can be swapped in, but it takes a fair bit of work and some fabrication to make it happen.