I hope everyone remembers my fossil hillclimber head project from the old forum: Most top fins removed, dual intakes, submerged in a sunken basement for a generation. I intend to run open springs and rockers, valve seals, double plugs ('cos that's where fins are missing)and now I am considering cutting thin-stem guides from scratch, since I have some nitrided Sport intakes left over. They are the same length, and I have to re-seat anyway.
Does anyone have experience with huge valves, like crashing or anything? I have a choice of mild to rad cams.