Gas Mileage???

I worked a lot today... went down to 10 deg @ idle then 25 deg advance all in @ 4000 rpm..

10 degrees at idle is low, like factory spec low. 25 degrees all in by 4,000 rpm is also low and slow.

In general, your timing curve should be around 15 -18 degrees initial with any sort of cam and 34-36 total, all in by 3,000 rpm. 10 degrees from the vacuum can seems about right though but if your total timing is only 25 degrees then you're still low.