SOHC Distributor

[Autoholic]

I've been continuing my research on this engine and I've come across some conflicting information when looking for the original distributor information. I know that it used a dual breaker transistorized ignition with only mechanical advance. For a drag racing application, vacuum advance is useless. The conflicting info I run into is the part number. The shop manual says C5AF-12127-BY and I've found from more than one reference (however not an official one) online that the SOHC had a C5AF-12127-AZ part number. I haven't been able to find actual pictures of the BY unit but have found pictures of the AZ unit. I know that the body of the distributor was the same, the last letter(s) indicate how the timing was setup. Any insight on this is appreciated.

[Autoholic]

Never mind, I found the answer from a long time ago on here.

http://fepower.net/simplemachinesforum/index.php?topic=368.0

[Autoholic]

I've also found information that suggests a -AV part number for the distributor. The example I found on this has a date code of 7C26, which means 1967 and could be legitimate if Ford decided to come up with a new part number for Autolite branded units built in '67. The BY was a FoMoCo unit and the AZ unit was both, as Ford switched from FoMoCo to Autolite branding in Nov of '66.

[cammerfe]

I've been continuing my research on this engine and I've come across some conflicting information when looking for the original distributor information. I know that it used a dual breaker transistorized ignition with only mechanical advance. For a drag racing application, vacuum advance is useless. The conflicting info I run into is the part number. The shop manual says C5AF-12127-BY and I've found from more than one reference (however not an official one) online that the SOHC had a C5AF-12127-AZ part number. I haven't been able to find actual pictures of the BY unit but have found pictures of the AZ unit. I know that the body of the distributor was the same, the last letter(s) indicate how the timing was setup. Any insight on this is appreciated.

Transistorized ignitions from that period used a single set of points, to the best of my knowledge. At least my own did. The purpose of dual points is to offer a path to increased dwell with one set of points being the 'make' and the other set being the 'break'. I believe dwell in a transistorized system is handled in a different manner.

KS