21A-12127 and 59A12-12127...?

Harylufa

Harylufa

Senior Member
Dear Friends!!!

I ´d like if someone can explain me, which is the difference between both distributors?
My engine is a Ford 1946 59AB, Which is the correct one?

Thank for your helps.

Hary.
 
21A-12127 is the 42-44, 8 cyl. distributor with the flat one piece cap(crab), the distributor has clips to hold the cap in place.
59A- is the 45-48, 8 cyl. distributor with the larger two piece cap, the distributor body has a bail to hold the cap in place.
see page 506 of the green parts book.
There are no major changes in the two distributor body except for the cap mounting. They can be interchanged. Aftermarket suppliers have the mounting clips to change the bail out and replace the two piece cap with the "crab" style one piece.
 
Last edited:
Terry said:
21A-12127 is the 42-44, 8 cyl. distributor with the flat one piece cap(crab), the distributor has clips to hold the cap in place.
59A- is the 45-48, 8 cyl. distributor with the larger two piece cap, the distributor body has a bail to hold the cap in place.
see page 506 of the green parts book.
There are no major changes in the two distributor body except for the cap mounting. They can be interchanged. Aftermarket suppliers have the mounting clips to change the bail out and replace the two piece cap with the "crab" style one piece.
Click to expand...

Walt Dupont--Me. said:
In other words, there the same dist, just change the caps. Walt
Click to expand...

Hi Terry and Walt!

Ah ok, it is just change the caps. My engine is installed with distributor two piece cap that has bail to hold the cap. I wonder if not being the original one could have some problem with timing.

Terry, which is that book you mention? I have a book that says "Ford V8 service bulletin 1941-1948 complete"

Must I get another book with info?

Thanks for posting
 
A little warning here on the crab units.
The rabbitt ear crab distributor also comes in a couple different configurations. Both cast iron and aluminum. If you look at this pic from our wall the outter ring for the two piece distributor cap is thicker and this one has a vent at the bottom . A standard cap wont fit this distributor.
Also notice that the locating pin for the distributor cap is internal only using a pin in the housing. This example dont have the side tangs but some do as well This one is aluminum but we have both in the box cast iron and aluminum...The internal parts are the same .
Also the cast unit uses a brass sleeve for the vacuum brake.....

100_9734_zps2d403717.jpg
 
BUBBAS IGNITION said:
A little warning here on the crab units.
The rabbitt ear crab distributor also comes in a couple different configurations. Both cast iron and aluminum. If you look at this pic from our wall the outter ring for the two piece distributor cap is thicker and this one has a vent at the bottom . A standard cap wont fit this distributor.
Also notice that the locating pin for the distributor cap is internal only using a pin in the housing. This example dont have the side tangs but some do as well This one is aluminum but we have both in the box cast iron and aluminum...The internal parts are the same .
Also the cast unit uses a brass sleeve for the vacuum brake.....

100_9734_zps2d403717.jpg
Click to expand...

Bubba!
Thank for your explanation. So, a 21A-12127 can perfectly suit in my engine too, am I right?

Now, after checked my dist installed now is a 59A-12127. This dist is not thicker and has not a vent at the bottom.

I really appreciate these kinds of help.

Hary
 
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