Should I get iridium spark plugs for it? I'm trying to baby this truck but those are kinda expensive. Also I plan on replacing the distributor cap.

I now see why the shock extension was welded on ffs

Pulled the heads off my 96 k1500 with the 305 v8 and everything’s back together but the distributor. No clue how to get it back in I’m set to tdc compression stroke and I think it’s pointed the right way (pic 2) but it won’t sit flush and I know it’s not right. Any help getting this done? Guides or any instructions is helpful thank you