1974 Dart Swinger

Johnny Dart & Button: what are the diameters of your tachs? I like the location you put your tach JohnnyDart and I'm looking for that size of tach. Is it 3 3/4" or 2 5/8"? Thanks for any info! Bill

Mine is 2 5/8"
Auto Meter Sport Comp PT# 3708
If I had it to do over I probably would have gone with the 3 3/4" PT# 3780