Thanks. My advice is simple. Put adjustable rockers on it. It's a performance engine. It needs them to assure consistent lifter preload across the board. Then measure for the correct pushrod length.[/QUOT
X2! !!! Went through this, same bolt on combination. (every combination, is different) I did the Crane conversion, with the Hughes 1110 spring/retainer combination. (Used a Howards retro fit LA hydraulic roller, and matching Comp Cams 1.5 ratio Chevy roller rockers.) Use an adjustable pushrod, for final length, check for sweep on the valve tip. (Hughes engines ,has a sweet conversion kit,. It's pricey, but nice...)