hi,, hope all going well . is there any chance that you could measure a hole for me . in the alloy engine that you got from me , there is a [ I think ] brass oil restictor fitted into block face to restrict oil flow to cylinder head . ive got to much oil going to cyl head, am useing the standard 20vt ball valve which fits in the side of the iron blocks , we did a rally Saturday but retirerd as so much oil was being thrown out the rear of the cam cover breather pipe into a separator but even that couldn't cope and over filled .