As I said in your other thread about these....just did a build with those exact pistons, 383 with 915's. So, in my mind anyway, they are fine for an old school build. They are heavy, but not too crazy heavy to use, and they are tough old slugs. One thing to remember tho, they are an older technology, and your motor builder will probably want them a little sloppier in the hole than a new style forging, because those will grow a little farther as they heat up. The end result is a little more noise on start (and you should be careful a such). All that being said, run 'em, you wont regret it! I know I would.
