if you go to yahoo.com and go to the message board, do a search for jyturbo. this is a group of people that do junk yard turbo stuff. if i remember right the t04 is the turbo used on the turbo coupe, if this is true, then that turbo by itself is to small for a 5 liter motor and the performance increases would be minimum. but a few things you might want to factor in is, a better set of heads and manifold, an intercooler (consider this manditory as the performance gains are substainal) with that said, i believe a street 302 is at it's limits in the 550~600 horsepower range, although they will take more power, i wouldn't trust the block for a really long time. A couple of cool pieces i would consider in a turbo motor build up (an FMU, and an electronic boost controller.
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