That is what I needed to know. Thank you. Ok, "bare valve stem" there is .125" from top of single lock groove up to the (5/16) valve tip. With my current Lunati 77132 locks (no LC recess) & Lunati 75740 retainers installed there is .050" from locks up to valve tip (all good) but they are 8MM & some say no problemo & some say possibly or highly likely. I have some manley 5/16 locks #13151 but with mocking them up the perimeter for the lash cap recess that these have is .017" above the valve tip (in the pic). I got antzy today & ordered comp cams 5/16 lash caps 619-16 which is a "Hemi .050" short cap" (their descrip) but I would much prefer to get the right locks on there & no lash caps but Gregory from Summit & Kiera from Manley we had a 3 way conference call this afternoon after me & Greg talked several days in a row regarding this & evidently no short caps available so I wanted to do something! That is where I am at so far. RR EDIT yes I can afford to lose some installed height
