Nice looking truck. Welcome to MUD

(official greeting)
The stock distributor was replaced with a non-usa dissy or possibly aftermarket dissy. Also, the coil is one I'm not familiar with. Maybe if you get a chance, can you take and post a few high-res pix, please?
Also, I would strongly suggest a silver star subscription so you can post lots of pix and avoid all the pop-ads. At 20 bux/year it's well worth it and you'll save buckets of money and time with people being able to answer your questions faster and more precisely.
(click on your user name and go to 'account upgrades' and choose your weapon).
ToyotaMatt s website:
VintageTEqParts.com - https://vintageteqparts.com/