21-02-2022, 02:41 PM
Sounds like you've had the block planed (or someone else has). You will need a spacer shim to go between the block and crankcase or some metal taken off the tops of the pistons. If I remember correctly the pistons should be .020" (?) below the block surface to allow for crank whip at high revs. The spacer shims are/were available at A7c.co.uk.