If the job pays that well, just be thankful and drive on. The money you will spend ruining that car won't be worth it.Before owning a '90 NA Mk III I owned a 1998 Toyota Camry. It was a commuter vehicle with Toyota's 2.2L 5S-FE inline four. Moderate power but on flat highway driving I was routinely getting in the mid to high 30's for MPG. I loved my '90 Supra for the Sport roof and look of the vehicle. At 200 hp in 2005 when I bought it I would be lucky to beat a stock Honda Accord but that didn't matter as racing and speed were not what I wanted out of the car.
I am now in a situation wherein I have a 110 mile per day round trip commute and will possibly for the rest of my career which could be 20 more years. I would like to get another MK III but frankly, 15-20 MPG isn't going to cut it driving that much. I know lots of people here have done swaps to get MORE power, has anyone done/looked into replacing the 7M-GE with a smaller, more efficient engine? I have thought about the 1JZ-GE non-turbo but am curious to know if an engine like the 5S-FE would work. I am assuming up front a V6 probably won't fit correctly, even if it was more efficient.
For those ready to say "This is complicated" I have a close relative with a state of the art auto shop who works on everything from Fords to Mercedes and Rolls Royce. I have expertise I trust completely to do this, what I want to know is how big a job is it to accomplish done right. I also have the budget. I commute because the job is high paying and well worth it.