318 /340 valve cover

I have a 70 swinger 340 with rallye dash. There wasn't a voltage limiter on it when I took it apart but was told it needed one. Didn't see any thing plugged into the back of those gauges. I am an old Chevy guy so some of this stuff is greek to me. I know those gauges didn't work when I first got car. Should be able to just use my email. [email protected] $50.00 total is fair to me, shipping was way too much.