Some of you guys are confusing Prestolite versus Chrysler distributors. Chrysler have the adv stamp # with L or R. Prestolite do not. They have 2 letter code L- or R- then you go to the Prestolite service manual to see what the advance is.

Only one Prestolite distributor of this vintage had 36 mechanical built in the distributor and that was the 69 440 HP manual tran. Auto got a Chrysler distributor.

6 pack and Hemi are different beast. Typical max since these where emission cars was 15 deg stop, or 30 at crank.

Did some research last night and matched service manual to Prestolite. Basically the 4014C and D which first used on the 69 1/2 A-12 and probably on the early 70 cars became 4017X types. The only difference in internal parts was the shift from the Prestolite type vacuum advance can to the Chrysler looking vacuum can.

4017D is correct for 70 6 pack manual late. DS means it was the service distributor provided over the counter. (Your shaft should be marked as an IAZ-3139LN May only be stamped 3139 LN.

If original here is what it should do:

Initial Timing set at 5deg BTDC

It has a 13 deg cam stop so max of about 26 deg mechanical at crank.

0 adv at 1150 eng rpm
2 deg at 1220
20 deg at 1800
24 deg at 3800
26 deg at 4800

add your 5 intial to the above. So ultimately you get about 31 at 4800.

Vacuum is 23.5 deg maximum at crank
0 adv thru 9"
2 deg 10"
10 deg 12.25"
20 deg at 15"
22 deg at 15.5"

I will repeat, that you need the gap and dwell to come in spec. Can't have one point set grounding out due to contact with frame or ground wire. Got to have a good coil and battery voltage.

Your initial can come down some.