New rebuild....but tic..tic...tic

So you have actual valve lash?
And the lobes are still all there?
I highly recommend a set of adjustable arms, and it might as well be 1.6s; if there's room for the extra 6% lift. I realize that these are pricey. But in the long run, you're probably gonna need them.Plus you might be able to set them up with minimum preload and buzz your engine up a few hundred rpm higher. 273 stuff works pretty good, and can be had for a reasonable price.

I would also check the clearance from the underside of the stamped rockers to the retainers. Those springs require the 340 rockers, which are factory clearanced for the 340 springs and retainers which are of a larger od than the OEM teener stuff.