Quote: i don't know what to do with this! seems to rev fast to 6,500. but it has to be restrictive LOL.
Dude, the distributor is on the wrong end of the motor for a six pak to work well on All kidding aside the dual plane six pak intakes, both SB and BB limit the peak HP and torque RPM My sixpak 512 C.I. low deck pump gas stroker made peak torque at 4500 RPM and peak HP at 5500 RPM, but that stupid car would run faster shifting it at or above 7000 RPM in 1st and 2nd gear and cross the finish line between 6300 and 7000 RPM depending on the track elevation, local weather and rear tire size I learned a long time ago to shift the car when it quit pulling hard in each gear
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
All kidding aside the dual plane six pak intakes, both SB and BB limit the peak HP and torque RPM 
My sixpak 512 C.I. low deck pump gas stroker made peak torque at 4500 RPM and peak HP at 5500 RPM, but that stupid car would run faster shifting it at or above 7000 RPM in 1st and 2nd gear and cross the finish line between 6300 and 7000 RPM depending on the track elevation, local weather and rear tire size 
