I see the "heavy" thing referred to those old forged pistons all the time. But I am not sure it's not much ado about nothing. I mean, I understand the advantage to a lighter slingin mass. Certainly it has it's advantages. But I've never seen a rash broken connecting rods and blowed up motors from the past using those type pistons. I think like with anything else, if it's machined properly, balanced good and assembled well, it will last just fine.
