Wow - there are no words for leaving the chain in the pan. Probably fell in and responsible party hoped and prayed that it wouldn't cause a problem. Being heavy, it just sat in the sump until you found it.
I've seen those wing-nut
oil pan plugs before and believed them to be an "emergency fix" until such time as the pan can be either repaired or replaced. I once changed
oil in a 50-something Chevy that had a hard rubber plug driven in the hole. When I got it out the threads were fine and I as able to use a new stock plug. Previous must have lost the plug and found something that would work.
Go figure... Glad you able to fix it Ken.
time for a new forum to visit. when they sold sr.com it went down hill fast. no more forum just a cheap site selling junkie cars. the canadians killed hr.com. mods are real pricks. as with any site...
Where is everybody?