help with a 1952 mercury truck gas guage

anyways, im kinda new to all this, i just sold my 1929 model A and have picked up a 1952 mercury truck and a 1951 hudson pacemaker, anyways the truck has been clipped, has a full wiring package from a 76 volare but running a gm 12v alt,
anyways what i have come up with is one wire off the tank is a ground other goes to the guage its been disconnected right now, if its a 12 volt what kinda resister do i need to make it work properly? and also cause wiring is so packed around it can someone help me out a lil and tell me how to easily remove the left instrument cluster,
any help would be greatly appreciated

 

im guessing not much help to be had
anyways thank you for who have atleast looked

 

Ford tank (and sender) with Gm gauge and Plymouth wiring???

 

I think LMC Truck sells resistors to run 12 v and retain your 6v gauges if that's what you're going for. I would seriously consider starting all over again with the wiring. I've never heard of a time when 32 year old wiring from a completely different car could be advantageous.