Hello all, I just had my heads rebuilt (valves replaced, new guides, new exhaust seats, new springs). I'm looking for a complete walk through of a proper top end check and put back together. I'm pretty new to a top end check, so speak to me like I'm 5. I'm pretty sure I don't need a rebuild, as the piston and cylinder wall looks good. I can still see good cross-hatching on the cylinder wall. See pics below. What measurement do my piston ring gaps need to be? Do I need to remove them and place them in the cylinder to check the gap? If I have to remove the rings, I have read you need to be very careful. What's the best step for ring removal and refitting? The Haynes said to use metal shims, could I use 3 feeler gauges to use to slide on and off the piston rings? When the rings are put back on, do the gaps needs to positioned in a certain way? When putting the new gaskets and push rods seals on, is there anything I need to know? I have universal sealant, should this be applied to the cylinder base gasket? I noticed there was a sealant around the pushrod seals that almost looked liked teflon tape, but I don't think it is. Any idea of what this is and if it is necessary? What should I use to clean and resurface the piston head? Should any sealant be applied to the cylinder head and valve cover gaskets? I'm also aware that a high temp copper anti-seize should be applied to the exhaust threads before re-attaching the headers/exhaust nuts. Any recs on this anti-seize? Thanks for any help you guys can offer. pushrod seal gasket?