I found some folks @ SEMA who re-do stock instrument panels to look original, but with modern gauges behind the original style faces. I showed them a couple of photos of my 444 cluster, and they said they could update it to 12 neg ground, with a GPS speedo and if I wanted, either a concentric tach needle or an LCD digital readout in a window at the bottom of the speedo, as well as swapping the ammeter for a voltmeter, all while keeping it with original looking faces on the gauges. If anyone is interested, I'll dig out their business card andI think it should bolt in, but you may have an issue if your PV544 is a 12v car. All the gauges in the 444 are obviously 6v. Heating ducts may be a bit different, but nothing that can't be worked around. Finding a 444 dash may be the tricky part, unless you've already got your hands on one.
Most of my stock 444 gauges don't work, so I have a 4 gauge cluster down by the shifter to keep tabs on engine, but I do like the way the stock gauges look on the 444.