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.

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?

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.