Roller Rockers 1.5 vs 1.6

I thought we were talking about valve to piston clearance (or lack of) if the OP uses 1.6 rockers instead of the stock 1.5's.

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Exactly.
His concern was the extra lift from the 1.6 rockers would cause a V/P clearance issue.

I kinda want 1.6 for a little "extra" lift from my cam but worry about valves hitting pistons?

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The max valve lift occurs at the cam C/L position.
So, at 106 intake C/L, the max lift occurs at 106* atdc......or, after the piston is past 1/2 way down the bore....... so with a stock stroke SB, the piston is like 1-3/4” inches from TDC.

Max lift in itself is not an indicator for V/P clearance.