As far as the distributor goes, the points base plate moves more side to side more then I believe it should.
It may be time for another. I guess going to electronic i s best if I am changing it out ?
Also the butterfly shaft on the carb seems to be worn also. I have a Motorcraft 2100 2 bbl. It has #57 jets in it.
Is this correct for the 391? No...because all 391's were 4V's.
The 330 M/D / 330 H/D / 361 were all 2V's.
Thru 1971, there were two point plates, upper and lower separated by a plastic bushing.
In 1972, Ford replaced those crappy upper and lower plates with a one piece assembly. On your truck...you might still have those two plates, or this one...
D2PZ12151A .. Point Plate (Motorcraft
DB187A)
This plate, the points, condenser, rotor, cap and etc are the same for 221/260/289/302/330/351C/351W/352/360/361/390/391/400/410/428/429/460 V8's thru 1974.
The points are the same thru 1976....and are still available from Ford (as are the other parts) and every autoparts store:
B8Q12171A (Motorcraft
DP12)