i have a cast crank motor with low compression pistons, can i switch out the low compression pistons with 10 to 1? a buddy told me that if i switch out the pistons on the cast crank to 10 to 1 that the crank rods and pistons will have to be balanced to make it work.

my question is, do they make a 10 to 1 pistons for the external balanced crank? or would it be easier and cheaper just to change out the cast crank with a forged crank? i have a good forged crank to use.

thanks