I have 91 or 92 1100oil cooled new rings stock shim head dont know if milled or not had to replace 1 sleeve and mill head 0.10 to clean up I used 2 block to crankcase gaskets to space it back it has 240 lbs cold compresson and 275 hot I need a spacer for block but dont know how to figure it out what thickness to get , it a 1216 12-5 webco pistion and dont know if is strocked or not help please ,runnig 20 laps on dirt track with priemun fuel