7mge to a 7mgte

I have a 89 cressida and was wondering if i could take out the turbo system from a supra and transfer it to my car? just want to verify that cause i asked a mechanic and he said that's all you need for it to be a 7mgte engine. If so, can any one tell me how to transfer em. If not do you know where i can get a custom turbo kit, I want to have 300 horses at least in my cressida. I've looked all over the net for a turbo kit and called to, some said they dont custom and some said if i want it customed i have to leave my car with them for a couple of months and i dont trust it. I'm looking for some thing close by and affordable, prefered. Thanks.