Converting over to guage cluster instead of idiot lights '72 Skylark

What is necessary to convert over? I know different sending units. Have 2 60 psi units on the way. My GSX came with gauges, and I use the 80 psi unit in it. Easy source for the temp sending unit?

But how do I go from the idiot light harness plug to the gauge cluster? Is their an adapter pigtail available?

Thanks. Haven't been here in a while

'69 GS 350
'71 TS GSX
'72 Skylark Custom droptop

 

http://www.buickperformanceclub.com/rallygage.htm

Here is a good pic of the conversion for the wiring::

https://www.stage1restoration.com/product/rallye-gauge-option-pointed-lens/

 

http://www.buickperformanceclub.com/rallygage.htm

 

thank you so much for your fast reply. Any part numbers for the water temp sensor? I have 60 and 80 pound oil senders on their way.

 

Napa: TS6469

Standard :TS6