Re: 258 mods and TR upgrade
Ask for the coil for any late '80 Ford car. That will be the correct coil.
Some of the Ford trucks didn't use the TFI coil until like '89 and I don't know why.
Don't rely on the store geeks for anything. Most of them don't have a brain, and they certainly can't get a grip on anything that the computer doesn't tell them.
If you happen to stumble onto a counter guy that knows what he's doing (more rare than beautiful, mute women that own a liquor store and muscle car dealership), then ask for that guy every time you go in.
"I Have The Body Of A God... Buddha"