Piston Size

[Ol' Ron]

For a general rebuild, the machine shop can determine the minumn bore size to clean up the cylinders. For a street rod, I'd go with a 3 5/16 bore and a .07-" angle milled heads. Using the stock cam this will increase the low and mid range torque, raise the Cr to over 8:1 thus increasing gas mileage and performance in an otherwise stock engine with out increasing the cost of the re build much. Be nice if you could buy auto thermatic pistons, but I don't know if anybody makes them any more. I built a 296ci engine back in the 90's with a set of 3 3/8 x 4 1/8 (296") with stock style 4 ring steel strut pistons. What a fantastic street engine that was as still is.
Gramps