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I've written a soon to be published book on this very subject. Too much to list here but I'll give you a few highlights. Ring selection there is only one Total Seal. I like the second position gapless. You can get almost as good results by file fit at wide open throttle only. When you throttle back for low power demands or idle speed the gaps open in the lower temperature and blowby goes way up. Expect a minimum drop in fuel consumption of 4%. Do not bore the block oversize. Rigid hone it. If your budget allows consider custom rods and pistons. Longer rods reduce cylinder wall side loading (less friction) Hone the block till the cylinders "clean up" and order your pistons accordingly. Keeping cylinder wall material at the max reduces heat rejection rate into the cooling system. Paint coolant cavity in block with rustoleum primer and color slowing the heat rejection rate even more. Use a dished piston .030-.060" depth that mirrors the squish pad(s) in the head. Have top ring groove .075-.100" from top of piston head. Place the wrist pin hole so that the assemble piston to head clearance at TDC is .025" Also have the top of the piston diameter as large as possible. That along with the ring placement will reduce the crevice volume and the unburnt fuel and air that gets trapped there. Gets the unburnt hydrocarbon emissions down also.
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