78 delay wiper conversion questions

[68 TT]

What needs to be done to install a delay wiper switch & delay module into a truck that did not come with them stock?

I scored a delay switch and module with pigtail at the wrecking yard today and I badly need delay wipers in my 78 K20.

I assume I will need to cut and splice some wires off the back of my standard switch to make the connections to the delay module connector. I really doubt I can repin the connector but I will give it a try and see it the two different connectors share pin types. Not likely but it is worth a shot just in case.

Anybody do a how to or have insight to give on this? Wiring diagram?

I can't afford to screw up my wipers now that fall is here.

Same truck had part of a tach dash left so I got the small fuel gauge out of it too while I was at it.