I like the crane rockers if you can still get them. the 1.6 will give you .516 lift without changing the duration. There is always a gain in adjustable valve train not to mention the stamped are less than perfect 1.5. Do your pistons have valve notches. Although the lift change when the pistons are close is next to nothing at max lift the piston is 2 to 3" down the hole.
Course you need push rods then too but can set your pre load to the bare minimum. (quicker higher reving)

and you will be able to adjust out that tick! LOL!