End play on '63 390" distributor?

[Henrik Sonne Hansen]

What should end play be on the distributor shaft. Mine already has a fairly thick shim in there, but the play is still around 0.053"

Could this cause erractic ignition? It stumbled and backfire when trying to run

On a 1963 390"

https://youtube.com/shorts/vGfOEdu43I4?si=ZLMdPgRDTKmmif3C

Henrik Sonne 

[Russ Austin]

There is alot of play in the distribs, but they work fine. 

[Henrik Sonne Hansen]

Thanks.

With the gears cut at a angle, does mean it puls the shaft down when running?

[Russ Austin]

I would assume so.

[CHRIS CARLSON]

That amount of play is normal ,  if you have side to  side play @ the breaker point cam because of a worn upper  bushing and shaft that would change the dwell, The point gap when its running but i doubt that's your problem. I would test your condenser with a condenser tester or replace it with a new condenser. if you have access to a working distributor machine preferably with a condenser tester meter , there are a series of tests to evaluate the overall condition of the distributor. I test all condensers even new ones before i install them. I would not purchase new old stock  condensers on line because they are 30& 40 & 50 years old and wont pass the leakage test 50% will fail. I perform distributor repair and testing & test them on a Sun 504 distributor machine.    Check your accelerator pump shot on the carburetor if that doesn't work  that would cause it to stumble & back fire,  also check for  vacuum leaks.

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