Possible timing chain problem

Again talking about my 65 289 Mustang. Every day I have.to reset the timing. I will have it running fine in the afternoon and then the next morning when I restart it runs like crap. When I check the timing I find it is off (usually retarded) and have to reset it. I’ve also noticed that when I try to adjust the fuel mixture when I screw in the right side the rpm’s barely fall off. Does this sound like the engine has jumped time? It doesn’t seem likely every day.

Realmongo said:

After you set the ignition timing and tighten down the retaining bolt, is the distributor fully seated and can you rotate the distributor at all?
Does the engine have a steel roller cam or cast iron flat tappet?
Do you know if your distributor has a steel gear or a cast iron one to be compatible with the cam?

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As far as I know it’s a stock engine. I’ve had it for a year. I’ve started to get to the timing chain. Every time I start it the engine always runs differently. Usually crappy.
I still have to get the harmonic balancer off and I don’t have an impact driver.

David A said:

As far as I know it’s a stock engine. I’ve had it for a year. I’ve started to get to the timing chain. Every time I start it the engine always runs differently. Usually crappy.
I still have to get the harmonic balancer off and I don’t have an impact driver.

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And yes the distributor is fully seated.