It just so happens they are in my DT book-

Payloader H-530 with a DT 414B SN149604 and below, .020" (in) and .025" (ex)

SN 149605 and above with revised cam, .025"/.025"

TDC, do valve numbers 1,2,3,6,7,10, spin 360 degrees, do valve numbers 4,5,8,9,11,12... Login to read more.