As a point of clarification....in my stock 54,the temp gauge (C-H) is a capillary tube mechanical unit. The gauge cluster is physically different from earlier AD gauge clusters. Most vendors list gauges for 47-53 but one offers to rebuild a unit with a core charge.
If by chance you have a 54 working temp (C-H) gauge and would like to get it off your hands you can contact me through email.
Hope this helps. Dave
