340 Build- rocker questions

I’d be inclined to use the Mancini 1.6 rocker kit, made for Mancini
by Harland Sharp. Either with pushrods:

Mancini Racing - Roller Rocker Arm & Pushrod Pkg




Or without:

Mancini Racing Aluminum Roller, 1.6 Ratio



The 1.6 will be natural finish, red is 1.5