Hmm... apparently some guy already did this. check the performance paddock. I think it would be a great mod, especially if you can get your hands on a supra TT engine. But, you would be doing a complete engine swap, requiring a new tranny, engine, and prolly a new rear end. It would be very time consuming, and costly, but with the right mods, you could have the only 1000hp 300E in the world.... btw... im not sure if the supra tt engine was an inline... are you talking about the older engine?