Hi 72,
I knew you had stretched studs and inquired with a US specialist company about extra hi tensile studs but they quoted about gbp1000 for 4, so that idea got shelved, but also thought about increasing the size from m10 to m12 to give more hold down, then the GFR chassis I had planned to put it into evaporated???? the spare engine is still here with std or 604 cylinder.
John