carb ported and manifold vacuum question

The shop claims to specialize in Mopars and he seemed like a pretty good guy so I gave him my project. Lots of time and things since then, I wonder about the specialize part, but the car is together... The original timing on the car would have been 5 degrees advanced, according to the sticker, but that's with all of the 73 emissions and stock motor.

I'll plan on changing the advance in the distributor in the next couple of weeks and seeing how that turns out. Thanks for all of the advice!