Originally Posted by KCS
You're probably not going to find any cast pistons for a 6.125" rod. The cast/hypereutectic pistons are meant to be a stock replacement, so they're going to be meant to be used with a stock 6.098" rod and a .944" pin. The 6.125" rods are usually meant for a .927" pin.
Take a look at Scat I Beams; they're cheap, have better bolts than stock, and you can get them for a .944" press fit pin which will work with virtually any of the stock replacement type pistons.
If you have the budget for a forged piston, I would recommend the Scat I Beam with a .927" pin and then a Wiseco forged piston in whatever dish/dome to get the compression ratio that you're looking for.
Thanks for the information. I really do appreciate your response. I've been looking at the Scat I beam rods but I'm only seeing them for a .927 pin style and either 6.100" or 6.125". And I'm not opposed going that route I really just am completely lost when I comes to all this. I'd rather not go forged just because I'm not looking to boost it anytime soon. Just wanting something reliable and that performs well.