what causes the distributor to arc out against the cap screw?

I haven't changed the coil but I will try , just thinking had a new distributor in it , and it was doing this so I bought another new distributor and put it in and it was fine til the engine got warm (about 20 min.) then it started doing it , whats the possibility of both coils being bad....

This is the first time you posted that info.!! Not likely 2 coils bad, unless cap was improperly torqued!? Good luck with this one!

thanks and yes it was coil,now the car will not go into 3rd it is an automatic and was working fine , any ideas...shifts from 1 to 2nd at about 5000 rpms and then from 2 to 3 about 6-7000 rpms , figure that is alot too much what to do

Yes I already know that it was the coil. Have a mechanic check the trans. detent cable adjustment!!!!!!!!"

yes it has seal