Can't get dwell high enough...

It's an adverb, since in this example, it's describing the verb "worn" as in worn out.
You're probably correct I just got my first cup of coffee yet still 5 in the morning..
at any rate this is exactly why I have all my customers just put in electrical module in there. It's almost 2020, at this day and age filing points and reading dwel meters is ridiculous... Not one of my customers likes paying for the electronic conversion but all of them loved the idea of one less thing to worry about more..
Edit; the last one was a 65 Ford Mustang and it fired right up and he loved it...