The disadvantage of using any commercial piston is that the only compression increase is from (perhaps) tighter deck clearance (not much better) and more displacement.
If the deck and chamber are untouched, a 300" (261 + .060" X 4.375" stroke) increases static CR from about 8.00:1 to 9.03:1.
Although extremely valuable, it's not high enough to tolerate very late intake valve closing. If you want significantly above 9.00:1 you need a custom domed piston, $$$.
