Quote Originally Posted by scottadams14 View Post
UPDATE: I used my borescope (my most favorite tool. seriously, buy one.) and found true TDC which was within half a degree on the harmonic balancer. Then I used the technique outlined by geezer in this awesome post and fiddled with the leads and their position in the distributor cap. I was able to get the base timing at 7 BTDC with the vacuum advance disconnected.

Now my question is, do I use the ported vacuum or the manifold vacuum? I was also reading that the Weber's are crazy with how much vacuum they pull, but mine is seems to run fine with the ported line.
How much difference has the ignition re-tune made? It's also interesting to note that TDC was incorrect when you were setting the timing (one of the reasons why my observations of tuning 'by the book' isn't always optimal) Ignition tune should be done with the vac advance connected but there's always a chance that the increased vacuum generated by the Weber would fudge the advance (it has to be connected if you're aiming for a dynamic tune). It's probably worth experimenting with...