Jerry I'm surprised that you have not already figured out the loss of compression ratio, you only need to know the c.c. displacement of the dome and then crunch the numbers.
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
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