Thanks for the replies guys. This is a race car first and formost and it will see occasional street use because I'm a glutton for punishment

Actually there are a lot of fun roads to drive around here and I want to take it on a cruise once in a while. I noticed a lot of vibration in the cab with the urethane but i never had any nuts loosen up on me

that's not something I want to worry about either.
Martin, is a built 091 bus tranny going to hold up any better than a 914 tranny? I can accept a rebuild every season to every other season but any more than that would be too much.