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I got a 87 Mustang with an 89 5.0 HO engine,computer and 5 speed.I am going to put GT-40P ported heads, with a E303 cam.I am an old timer street builder trying to build my last fast ride in you guys computer controlled cars.I know the e303 needs 120 seat and 195 open.Can someone tell me the best springs for the heads?If anyone knows a better power set up,I would like to here it also.I don't know what I can get away with and the stock computer let the power lose.I already have duel out with flow masters 2 1/2 " and good headers.
 
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