" DBM is blowing out gaskets at 7250 to 7500."
DBM is not blowing out gaskets by revving this old single up past 7K. I've been doin that for months with absolutely no ill effect. I sucked that gasket in when I installed the KrankVent. It had nothin to do with engine rpm (just my opinion, but it is my bike, and I do have first hand knowledge on the failure).
I am still troubleshooting the gasket failure. I believe I have narrowed things down. The differential I measured across the gasket was miniscule, and to me, it seems highly unlikely that the failure was solely the result of that little bit of vacuum I pulled in the crankcase. My focus is currently on the fasteners. I doubled up on the copper washers to compensate for the material I lobbed off the cylinder. I'm thinkin too much soft copper in the sandwich.
Regarding the 340b & 402 grind cams, they are appropriate for my project. The objective is to learn and share. What's good for the goose is not always good for the gander. I want a hotrod, these are hotrod cams.
I will post the curves when I get a chance. They are interesting. These are not bolt-in cams.