Smokey yunick did this same combo to make high RPM engines, he said they made a lot of midrange and were ideal for circle track dirt cars.
And just for 70 Nova,, here.
Cubic Inch Calculator:
bore X Bore X 0.7854 X stroke X number of cylinders =
Or
4.000 X 4.000 X 0.7854 X 3.480 X 8 = 350
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