BB and SB distributor ?????

[Highbanked Hauler]

 Is there any difference between a BB and SB distributor other than the length of the shaft that goes through the distributor into the drive gear ?   Could a SB dist. be changed over for a BB  What I am looking for is a Dual point dist. for my 500 as that is what it came with.  Thanks...

[Ghoste]

They rotate in opposite directions.

[Highbanked Hauler]

They rotate in opposite directions.

So would the cam lift the points at the wrong time ?

[Chryco Psycho]

the whole mechanical advance plate system and the vacuum advance  & could not work rotating the opposite direction .

[Highbanked Hauler]

the whole mechanical advance plate system and the vacuum advance  & could not work rotating to opposite direction

         Gotcha,   Thanks

[Cooter]

I had a 383 RoadRunner one time that wouldn't run right due to a bent distributor shaft. How It got that way I have NO IDEA. All I had at the time was a 318 Dist. bolted it in and while it would fire up and run, you just couldn't rev. engine past 2300 RPM due to it rotating backwards(No mech. advance in timing). Points don't care if they are opened in the normal direction, or backwards.