John, combo's that work and pass emmisions;
Dad's '89 GT... basic 306, mildly ported edel performer 5.0 1.90 heads, E cam, 1.72 rollers, C+L meter, 65mm throttle body, GT40 intake, FMS shorties, catco 2 cat replacement pipe, dynomax mufflers on stock tailpipes, AOD with 3k convertor and 3.73's.
And mine... Pushing 390RWHP with the blower. Basic stock 306 rebuild with forged pistons and total seal rings, box stock AFR 185 heads except fully studded worked by a Crane 2030 cam (216, 220, .533", .544") and 1.6 FMS rockers, 12" K+N feeding a ported and polished Paxton SN-92 blower through 3" stainless plumbing and a ported C+L meter, ported and smothed 65mm throttle body, well ported and smoothed GT40 intake (ported to match the AFR's), ported
BBK lontubes, homemade H pipe with catco cats ($15 swap meet specials), MAC flowpath catback with 3" tails.
Pretty funny watching the girl run it on the dyno, kept overshooting the graph on acceleration really far, like she wasn't used to something with power. Asked her if it was her first time and she smiled, then asked if it was for sale. Car passed pretty easy.
The turbo coupe I just built fair much worse, but I found out that when I converted it I didn't hook up the o2 heaters... He retitled it up in Cumberland and doesn't have to worry anymore.
Jamie