I would be a little concerned about using a standard SBC starter for the 6.5, 20.5:1 compression ratio is a tall order unless you use a high torque gear reduction starter.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy