what you could do then is to use the cylinder head studs to "pull" the cyinder off the cases. Basically build a plate that has holes that the cylinder head studs can slide into. Attacht that plate to legs that reach down around the cylinder and meet on the case. Use the head nuts to "slowly" lift the cylinder off by tightning the bolts down a turn at a time for each nut.

So basically think of a bearing puller but for the cylinder.
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Charles Gallant