My 89' made about 460-480 on a daily basis at 17psi. I always drove my car hard. My motor had 160k miles on it, all that was done was a MHG and ARP studs.
My setup was near identical to yours. 35r, AEM, Custom Piping, eBay manifold, tial gate and bov, 550s.
@21psi my car made 501, in...