The chains are 40 link/inch chain - good hobby shops have it. I bought a couple of packs of metal lift rings (used as details on diesels). I count off 16 links and cut, then carefully open each lift ring, hook the end of the chain and squeeze the lift ring closed. Then I drill holes in the end of the P-72 and insert the lift rings. I use a 10X magnifying lens... my eyes ain't what they used to be. Yeah, it's a little crazy, takes some patience, but the chains look nice. Here's the lift rings:
Lift rings.JPG
and several different chains
Chains small.jpg
And a closeup of the chains (yeah should use a smaller drill on the next car)
Chain detail.jpg
What i found really helps to mount grab irons and such on F&C rosin kits is a Dremel drill press adapter that holds the dremel tool. I've got a #77 drill and have not broken it in a long while. Just be careful your finger doesn't get in the way! Got to find a way to slow it down.. even at the slowest speed it will melt plastic!
BTW thanks for the Morris Park pit information!