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We just use the stock GM cranks 3.76 stroke, twist the motor up to 9600. Has run 5.96 @ 242, works good. Stephen McClain Tri-State Racing AA/FD
We run them in the aluminum until they get loose then put in the bushings.
We used the two 12 volts that were in the crew cab truck and a series / parallel swithch, ( like the big trucks use ) to swithch from 12v to 24v....
We used 24 volts on ours. Stephen McClain
Chevrolet on Nitro We have run our Iron block Dart @ 9600 rpm, that was on a 6.12 @ 242 at this years Bowling Green NHRR. We only run 14% blower...
Bolt pattern is 5 on 5, back spacing is between 3.5" and 4 " Stephen McClain Tri-State Racing AA/FD 410-392-6619
We use the Fel-Pro PermaDryplus, they have lasted for years. NO leaks Tri-State Racing AA/FD
Bowling Green Bowling Green is a Heritage Series race but has no points. That race is a good one and does have Top/Fuel.