I have started putting one of the Mclaren 305 Gen 3 engines together and have hit a snag. The Bryant crank has 4 holes to mount the crank position ring but the 6.1 rings I have don't fit. Bolt circle is off. I called Bryant and they had all the info on the crank from 2006 except what I need. They were very helpful and searched all the info they had It called out 4 bolt holes but no info on dimensions. Anyone know of a ring other than the 6.1 for the gen 3 with 4 bolts? This is 1 oddball crank.