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Pretty sure that turbo is going to be too small. Not going to make over 500/550 on a 4.6. Its designed for compact engine compartments and small motors. The turbine wheel is a 68mm. You want to look for one that is 75mm.
Buy a used "regular sized" 76 and have it rebuilt if need be if your trying to spend less than a grand.
 

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Whats your hp/boost goal? My buddy made 640 to the wheels with a Turbonetics TC76 with a .96a/r at 14psi in a 6.0 chevy. Shoot my lil master Power T70 with a .68a/r made 485rwhp on a stock 302 with a f cam and systemax manifold. Im going with a h/c/i 351w and upgrading turbo to a t76 with a F1 wheel hoping for 600rwhp.:joy:
 

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Never been too impressed with turbonetics stuff in general. If you want made in the usa name brand go with comp or precision imho. I made 650rwhp at 16psi with a billet 67, its rated to 950hp, and it spooled 1000rpms sooner than the cast wheel 67 I had before, both journal bearing turbos.
 

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I contact power adder solutions and see what they can do on a nice Borg Warner unit...you can find those for a decent price
 
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