77 cluster circuit board fit 76 too?

[drmiller1]

Hey There,
I have gauge cluster that appears to be close to my original (76). The only thing I see different is the 4 wheel lock light. I need to know if it is a go or not. If no as is, what changes need to be made. My original is very rough, most mount tabs are broke, no lens, and faded dirty gauges. The replacement is a 77? k truck unit maybe. I'm not sure, info I have found is not too clear.
any help would be greatly appreciated.