I have a 89 vert with the following mods. S trim @10lbs 87mm mass air, 75mm t-body, ported edelbrock performer upper and lower, gt40-x heads, b- cam, the standard fuel system.190lph&a trex, 30lb injectors. I have a chance to sell the heads and cam. I would like to change to afr 185cc heads and a comp xe274hr and adjustable roller rockers. This car dynoed 478 rw horsepower on pump gas w 2 degrees of retard per lb of boost. I wonder if these new mods would really improve my performance or just be a quality improvement. I've seen people take a car apart that was working and make it slower.
