get a DD and a factory supra manual. disassemble the whole entire engine(first put on a stand), label everything. find out what each part does, etc., test-check each part properly, get new parts if needed, put it all back together. then drive for a couple months making sure all is good.(could dyno or by knowing youll feel the way it should respond). then from there on do bolt ons in the order of performance stages.
next time you say your car was covered in smoke, it better be from doing burnouts and donuts.