So for the V8 UrQ I'm going to use the vacuum brake booster from a 4000Q. Question is this.... will the large bore Master cylinder from a 1990 200 work with this vacuum booster. I believe the MC from the '90 200 was the same as the one from the RR UrQ, right, with the 25mm bore. Anyone have any thoughts? Thanks. Andrew Finney 1983 and 1985 UrQs.