I used 5/16 smith bros. This is what I sent michael @ B3.
Engine type, SB 414
Cylinder head type, Trickflow 190
The measured distance between the top of the rocker shaft and the valve tip of one intake and one exhaust. (FIG. A) This seems to vary 4 different valves, .277 I, .266 E, .281 E, .245 I ???
The measured distance from the rocker shaft and the valve stem. (FIG. B) 1.920 to 1.921
The measured distance between the rocker arm bore and the roller tip. (FIG. C) 1.320 - 0.050 (see attached)
The rocker shaft diameter, .6850
The diameter of the roller on the rocker tip, .5460
Intake and exhaust lobe lift from cam card and valve lash, .557 I&E
Rocker arm brand, offset and ratio, Erson standard and 1.6