I suggested Comp Cams 10* Super Locks for lash caps to gain a little clearance for the self adjusting rocker rails. I bought a set of those locks and trial fitted them with a rocker arm, valve and 10* retainer and did not gain enough clearance, even with the 10* locks and retainers which are wider than the 7* locks and retainers. I decided to purchase, prepare and install a set of Manley valves with .290" tips, even though they are about twice the cost of Ferrea valves. BTW, my engine builder used Comp Cams 795 10* retainers and Comp Cams 613 10* locks. I called him at home and he said he did not use the +.050" locks. He said he shimmed the exhaust valve springs enough to eliminate the valve rotators without using +.050" locks. All valves have 1.750" height and the train works perfect.
Comp Cams 26918 beehive springs
Comp Cams 795 retainers 10*
Comp Cams 613 locks, 10*
Scorpion 1073BL rocker arms, 1.5:1 self self aligning, narrow body.
ARP 134-7104 rocker studs, 3/8"-24 x 7/16"-14 with Time Serts.
Alex's Parts shims, 1.255" O.D. x .875" I.D. hardened
Comp Cams 7940 push rods, 7.200" chromemoly, .080" wall
Comp Cams 15850 hyd. roller lifters, REM finish, short travel, .005" pre-load.
When I was trying to determine what valves to use, I finally called Ferrea and their representative suggested using the Ferrea Ford 351W valves with .395" tips. I am sure those would provide more rocker arm clearance than necessary but I thought the extra long tips may cause a problem with the rocker arm, rocker stud and push rod geometry. I purchased Manley Vortec valves with .290" tips. I believe those valves were designed with self-aligning rocker arms in mind.