I'd err towards burn the heretic
.....hhmmm
I kinda like the idea of roller rockers...but that's not why I'm here; No work today, so figured I'd check the clearances- in@0.009 /ex0.012 might close the ex to 11...but that's also not why I'm here...
While doing this check I remembered that the way to do the clearances on my '69 Daytona was to close the adjuster in to zero clearance, and then wind it out something like a quarter turn, to give whatever it should be maybe ~7-8 thou
...sounded a fairly dodgy at the time, but have since figured that depending on the thread pitch (maybe 1/4bsf on that?), seems logical, so I've applied that logic to the A10 and wasted time over a cold tongue lube
, and created a tool which I'll paste later........but that's also not why I'm here....
I had a thought, and another look at Morris's photo, and going by the shape of the indents it kinda looks like maybe the rocker geometry could be a bit wrong, maybe the pushrods are too short/long, (could be a consequence of gasket thickness?) and also maybe the thackery/shims are a bit flaccid...
I asked about rocker geometry awhile ago, but can't remember any outcome..??