[mr0077]

Mike, I dug out an old dusty book I inherited with my block, with some information, on the production Medium Riser camshaft (C3AZ-6250-AA) and the upgrade Ford part, recommended for the MR and HR motor (C4AE-6250-B):
Both cams are mechanical flat-tappet, 0.025" lash, 0.500" lift, with other specs as follow (C3AZ-6250-AA first/C4AE-6250-B next):
duration 306 deg/324 deg
overlap 78 deg/112 deg
intake opens 40.5 BTC/56 BTC
(14.5 ATC/TDC)
intake closes 85.5 ABC/88 ABC
(29.5 ABC/28 ABC)
exhaust opens 88.5 BBC/88 BBC
(33.5 BBC/31 BBC)
exhaust closes 37.5 ATC/56 ATC
(18.5 BTC/3 ATC)
(I can't tell you what the extra set of numbers in parentheses are on the open/close events, just copying the info from the book).
For comparison, my comp cam (FB282S-10) has 0.022" lash, 0.571" lift, 282 degrees duration (@ 0.015" lift), a 110 deg lobe separation. Cam timing (@ 0.015" lift) is
intake open 35 deg BTC, close 67 deg ABC,
exhaust open 75 deg BBC, close 27 deg ATC.