Better acceleration?

Dale Davies said
I do believe you missed your flight. My point was piston CD and piston availability to get the CR up for street, not racing. A well built and tuned 225 should perform well and get good fuel economy.

My point is/was there are easier/cheaper ways to increase CR on a slant than swapping pistons and rods. Just mill the deck and/or head. Close to 11-1 can be obtained with No special parts.

Dale Davies said
A well built and tuned 225 should perform well and get good fuel economy.

Agreed. Even a well built 170. I have a 64 Valiant (strictly street)170 9.5 CR mild MP cam, high flow exhaust (stock manifolds). Holley 1 bbl carb, HEI ign with a recurved dist. 3.23 rear, 3spd stick. It will smoke the tires, and gets upper 20's mpg. I actually have a little too much CR for the mild cam used. Need mid to high octane gas. Should have a little more cam or a little less compression. Tuning was a bear.