YR,
You are getting confused with what I said.....& what I didn't say. I never said BH springs fixed poor geometry. Post where I said that. What I said was for the OP to use BHs in response to his post #44, where he said he was grinding rockers for spring clearance. In other words, no grinding of rockers reqd if you use BHs.
My 'suggestion' to lowering the rocker shaft was a reply to RRR's #61 post where he said geometry was corrected by 'relocating' the shaft. A bit of sarcasm was what it was.
As for BHs not being new, I am well aware of that since I have been doing this since 1965. I have used BHs in many engines for at least 15 yrs, & will be using them in a 440 I am currently building. Anybody who doesn't use BHs/conical springs when they can with all their advantages needs their head read.
