49 - I can't comment on the Holley Webers but I am using the Langdon mini-HEI. I did think of a couple of things as I read your post:

1. Did you remove (and plug) the vacuum line from the advance mechanism on the distributor before you checked your timing?

1. No, you don't use a dwell meter on an HEI.

Good luck, hope you get it ironed out.