Chicken teeth

Went to my local pick n pull today and found that someone had dropped off a mid 80's Laredo. I got the factory clock, tach, and intermittent wiper set-up for cheap $$. Any other rarities I should look for??

I plan on using the wiper set-up in my '74, but know there's a few issues. One is that I need a 4 wire wiper motor. Not sure which mine is.
Secondly, I'm not sure if this will be plug n play with the '74 harness. If not, I'll need wiring diagrams from both models to patch it in.

Any other concerns??