Need Opinions. Have nothing to compare to.

I will say that the shop owner came out during testing and said it "Sounded lazy" and suggested giving it more timing, but was surprised to hear that we were already at 45.

Do you think it may want more initial and less advance? Should I try pulling the vacuum advance and going back to straight mechanical, then give it a little more initial?

Can there be gains in increasing the jets if the A/F ratio is already running in the 12-14 range? Wouldn't it go rich if jets are increased?