318 to run 13s

I did 13.92 in my 65 Barracuda, full interior, all steel. Stock short block, small chamber heads shaved .030 ( I used 1966 273 heads, 302's would do) with 1.88, 1.6 valves, MP thin composition head gaskets. Edelbrock Performer intake, Holley 3310, an old Crane Blazer cam, "D" Dart headers, 166K MP converter, 3.55 gears, 215/70x14 tires.