[Brian]

Thanks guys,good to know. JDL, you raise a good point about the appropriate valves and springs. I previously mentioned the springs were shorter, I am also aware the collet groove on the valve stem is in a slightly different location than regular 8BA valves. I don't see it being much of an issue as I'll be shimming the springs to get a certain seat pressure.
Incidently, this particular engine is getting special, oversize valves that I've made, the seats have been cut bigger to accommodate the valves, and there's just no room for inserts anyway [not that the C69A block had them to start with]. Hence my original question. Russ/40, yeah, I'll only be running a stock 32 steel forged cam in this one. Dude, and it's going into a 35! Cheers, Brian