I'm new to this Forum so a big Hello to everyone. I'm looking forward to talking with you guys. I do have a question though. I have a 72 Chevy 4x4 truck and it has an old 60's Model 651 Airguide Tachometer already mounted in the dash. It looks to be in really great condition and I'd like to use it if I can. Its not wired up at the time. I got the wiring hookup off of the back of the tach but I'm wondering if it will hook up to the tach terminal on my Chevy HEI distributor. Its an oldie but goodie and I don't want to hurt it. I appreciate any information on this you can give.