Bullit:

You have a timing tape installed, and you have a timing light with dialback (which will work just fine). You're covered!

In my opinion, it would be easier to not use the dialback feature on the timing light and just read the timing on the timing tape.

See if what is written in all the previous posts makes sense, and shout back if it doesn't.

Also, let us know your timing at idle and at full advance.

Jim