For what its worth my factory headed 360 with 9-1 comp has been 12.50@110 thru the mufflers on 87. In a 3775lb E body with a 4 speed.
Doug
Care to share your build?
.060" over 360, 9.0-1, Crane hyd roller HR-222/339-2S-12 IG, 1.6 Crane rockers giving .542/.563, LD340 intake w/ divider milled, 650 Holley DP, ported later model 360 heads w/2.02, TTI headers and 2.5" exh. The 12.50s were with slicks and a 4.30 gear. It's been 12.70@107 w/ 3.55 and old BFG drag radials. Always run with the air cleaner and exhaust. It has the factory 2.47 1st 4 speed and a Centerforce dual friction clutch.
Doug
