As mentioned in your other thread, rebuilding your flippers is the best option to get more power out of an old machine.

If you don't like that, replace the assemblies with updated versions.

A good source of info on the bally linear flippers is here: https://pinside.com/pinball/forum/topic/vids-guide-to-upgradingrebuilding-flippers/page/11#post-1855100

Replacing good OLD coils with good NEW coils isn't going to change anything. So unless it isn't currently flipping at all or won't hold, nothing will improve.

If you've done the proper maintenance and you still don't like the power, then take 100-winds out of the coil.

If you aren't comfortable with that, call Steve at PBR as ask for his recommendation. He probably knows every coil ever made and can get you something that will fit.