198 slant distributor

So I repelled my head and head gasket , new manifold. All is good now . I did not pull my distributor or even my cap off for this work .

now my motor at idle & vacuum advanced pulled off runs at 20 degrees advanced. If I move distributor far right as it will go that is 20 degrees advanced . And if I move distributor to left all the way it then goes up over 40 degrees advance .

keep in mind I didn't pull wires or cap off even move the distributor at all while doing my head swap .

Maharashtra can cause this much advance ? Motor before I took apart ran perfect at 10 degrees advance. How could head swap do this ?

no I didn't pull cam , or lifters it timing chain and I re used my push rods too .

car is still points and they look good and I didn't touch them yet .