Shizuoka AN-S servo drivers

I am looking for advice on servo drives to use when retrofitting shizuoka AN-S milling machine. Most of the CNC controls were already removed when I bought my machine but I do have the original analog servo drives. From my understanding it would be worth updating to digital drives during the retrofit but I am having a hard time finding drives rated for enough amperage as my servos call for. I will post a picture of the tag from one of my servos but the biggest I believe has a peak of 55 Amps and is rated for 150 volts DC. I am also concerned about power supply for these motors. Any recommendations for what drives to use that will be able to take advantage of these powerful servos without busting the bank would be great! Of course I am then planning to use Mesa cards and Linuxcnc to control the machine.

Why exactly do you think you should change the existing drives?

I do not know whether the original drives are good or bad but from what I have read I believe I would need to use a converter to interface the analog drives as well as the fact they are probably 40 ish years old and pretty non replaceable if there is a failure I am thinking it would be smart to replace them now with something more modern and that I have access to documentation and such. If there is an easy way to reuse the original drive that makes fiscal sense I might be willing to try it. Do you have suggestions there?

I agree planning to start fresh with new drives. Do you have any drives you recommend that can handle these servos? I will link the drives I have been eyeing up. They are rated 0-35 amp current limiting and 160v. This is the closest I have found to the 55 amp peak the servo tag lists that isn't too pricey. I would love to be able to take advantage of these powerful servos but if all I lose out on is some acceleration I may have to sacrifice that for cost.

Servo Drives:
shop.cncdrive.com/index.php?productID=366