OK all you experts out there, I think I may have messed up. I bought new take off 96 inch cylinders and pistons off an 08 twin cam to use on my on my 02 engine. Now I'm wondering if they will fit and if so can I use my original 02 heads? One parts guy at the dealership said no problem, and another guy was a little leery about fitment. I bought the parts on ebay for a good price, but they haven't arrived yet. I'm afraid of tearing into the engine only to find out nothing fits. Any advice?