Factory gauges with newer motor?

[desert-rat]

69 GMC 3/4 ton.
Thinking of going with a 5.3 out of a Silverado. Since clusters are electronic now, how do I go about using the cluster in my 69 if and when I put in the 5.3 from a Silverado? I would like to keep a factory look. I may add the tachometer in the Factory location since it doesn't have one now. I still want to use the gauges like the oil pressure and volts. Thanks.