Question for our gauge experts out there

[XXL]

Will the "base" gauge set (speedo, center thingie, fuel) bolt up to a "loaded" gauge set's bezel? Obviously, I realize that there would be 4 holes at the bottom of the bezel that didn't have anything in them. I just want to know if they'll even bolt up together.

Also, if I were to convert from base instrument panel to the full panel, does the base wiring harness/plug still work for the base gauges? That is, can I swap panels and my gas, signal indicators, high beam indicator, etc., still work... and I would just have 4 gauges on the bottom that weren't working??

Thanks in advance,

Kenneth