You have a similar setup as me, But I have drag suspension, and I cut a 1.71 60' on my 12.55 run. Plus you have more motor it looks like than I do.
I run a 10" with 10psi.
Skyler
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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
50-175 Nitrous Works WET Kit just added.