YES! Summit racing has rebuild kits and, AND you can adjust them as needed, for example, you don't like the low comp pistons from speed pro they have in the kit, sub out the part of a KB slug instaed and they'll adjust the price.
Kits are preety inclusive for all ya need. IMO, it is a good deal.
If I was in your socks just doing a 360 for Ha ha's, I'd go the summit rebuild kit with the KB slugs for upgraded compresion and simply bowl port the J head and not worry about the intake valve size, just how well it seals.