The flat tops should not be a problem if you don't have an extreme cam or have removed a bunch from the block and head surfaces. Ask the seller. When I was looking for pistons for my 153 four cylinder (2/3 of a 230) I found that as the bore is increased the replacement pistons have the compression distance lowered to maintain a stock CR. I wanted zero deck height and stock replacements were farther down the hole than originals with original bore. I settled on forged flat tops for a 250 six which with a 181 crank made them stick out .020". Then life got in the way and the whole project has bee sitting a few years.
