I have a letter here of the list of things to change over at kk plant where the 70 shelbys were converted from 69 to 70 models in fall of 69. I talked to some of the workers who did some of the work on the 70 shelbys at KK and they even had to changeout some of the batteries from unsold cars that were built early in production because back then u had to keep adding water to the batteries. They said they couldnt sell a new car with an old battery in it as part of the warranty. Remember some of these cars sat around for a year or so before being sold. The 70 gt 500s had distributors changed out to the new 70 cj distributors with dozf #s and they were date coded sept 69 and years ago i got some nos leftover dozf dual point distributors that came out of kk plant. The 70 gt500 4-speed distributors had a hard to find dual point wide gold band vaccum advance that had a different arm bend to attach to the unique higher dual point plate and unique dual point cam lobe. The dual points sit up about 1/4'' higher than single points and have a unique orange boot wire that routes out the side of distributor in a different hole location that is closer to the vaccum advance. That hole location is how u can tell a fake from a real dual point restamped distributor. Years ago these fake restamped dual point 70 cj and boss distributors stated showing up after they repoed the dual point plate and cam rotors imagine that huh!!!
WHO is the source of those dual point plates and point cams? I could only find them from Perogie who promptly reamed me on the price, but that was to be expected, considering the source.
They were the only ones with any kind of stock on them.
An academic point on that subject. There is more then one point cam. The B2 has a different advance notch in the pitchfork then the 351c does.
The B2 is a 10 degree notch. The 351c is a 12 or 15 degree notch.
The B9 has it's own distributor listing and might have another variant?
I don't know about the 428 point cam since I have never seen one but I would assume it is unique to the 428 as well?
There were Motorcraft service part numbers on the two that I have, the B2 and 351c, but they are long obsolete.
The points plate seem to be the same though with no part numbers showing on mine but stamped MOTORCRAFT not AUTOLITE as I would have expected.
I think that the weird dual vacuum advance part with the yellow cad center strap is the same though? It's stamped with a something 6. Can't read the first character on mine.
The odd thing that I found was that the arm where attached to the plate has no fastening c clip. It just humps the stud on the plate.