155......okay, not too bad.

I'd say knowing that.......the cam isn't "way too big", and since the speed picked up, and the fact you already have a 9.5" converter......go ahead and get it loosened up.

The cam you're running is designed so you can really play with the lash.......from .015-.030.

If you go to the track again before you get the converter done, try loosening the last to around .030(if you're not close to that already) and see if it picks up in the 60'.