The following table of measurements was taken using a MR-1A Block with a set of stock KRE Aluminum D ports with Tin Indian Performance .060 thick intake gaskets. All of the intake manifolds measured were in their original / unmodified form. Measurements were taken off of the carb flange to the valley pan area. Some of the intakes have tapered carb flanges. All measurements are in inches.
Intake Front Measurement Back Measurement Tapered flange?
KRE North Wind 9.622 9.622 No taper
Edelbrock Torker II 8.176 8.397 Yes taper
Edelbrock Victor 4150 10.868 10.868 No taper
Edelbrock Performer RPM 8.932 10.054 Yes taper
Professional Products Hurricane 7.515 9.268 Yes taper
Edelbrock Victor 4500 10.825 10.825 No taper