I am about to upgrade from 383 to a stroker 421 but I need some contact info on where to get this stuff from and has anybody here done it was the power over a 383 worth it. Any and all info is welcome.

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1992 383 Z-28 w/SuperRam intake and ACCEL DFI, PA Racing K frame,SS hood,SS rims
http://members.bellatlantic.net/~vze2j76z/2page.htm