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I've built a couple of 240Z's w/ a draw-thru turbo set-up. We used a 6AL-BTM. Usually dialed in about 1.5 degrees/pound boost. Depends on tune. They work well. Takes a lot of tuning to get it all right, but WAY worth it. Watch out for knock. Look into water injection also.
thanks for the info i am looking into either water injection or a small no2 shot to help cool but its going on an towing rig so im not to worried the intercooler im hoping will be enough