Hi,
Yes, as long as you use the sending unit from the 4 cylinder (or a replacement designed for the 4 cylinder). I did this when I set up the original 6 volt gauges in my '55 to work with my 12 volt V6. You may need to use a brass pipe thread adaptor (NPT) to get it to fit the block. You can get one at a hardware store.
Regards,
Jos.
Hillsboro, OR
1955 Willys CJ5 Buick 225 V6 160HP 270ft-lbs, T90 trans, Warn OD, PTO winch, Spicer 18 T Case, RS9000's, Dana 25F/ 44R,
5.38:1 gears, 11" brakes, Bestop Supertop, Hurculiner