Expect the same airflow on 1987-1995 SBC truck heads ,those are the worse heads for flow,,but even w/that bad aiflow,my Syclone has run 12.0 in the 1/4,just goes to show,when you are forcing air through highly restrictive cyl heads, it's still possible to run OK. Side note,,guys w/there Syclones swapped to better flowing 1996 & newer Vortec heads & run approx 1/2 second faster in the 1/4 mile,so good flowing heads,are a must if you want to go fast.
