I don't like the steering wheel mounts that come with aftermarket tachometers. I like having it on top of the dash in my line of sight. I printed this mount for my 1987 Ramcharger. It works great, I just stuck it down with some 3M dual sided adhesive tape. No holes were drilled, not even to route the wires. there is enough room /slop in the way these old dashboards are assembled to squeeze the wires through without drilling. Hope you find this useful! Thanks for visiting! This mount should work for any 88mm gauge, the ID is 88.50.