Wasn't Jim's McDonalds sponsorship when he ran under Larry Minor's banner? I seem to remember Minor's Mickey D's deal originated through his potatoe farm and it's relationship selling product to McDonalds.
I agree that the loss of Jim would be significant. My wife and I were guests of his (and Jerry Bickel) at a Topeka race back when Jim had the big #1 on his window. That was one of the coolest experiences I've ever had. He qualified #1, had a #1 on his window, and then won the event! My favorite pic is the 8x10 with his team and car in the winners circle. Watching Maskin tune the Big Chief, and Jerry tune the chassis was like watching an all-star team prepare for battle. This Mopar man was more than happy to wear a Pontiac shirt all weekend long!
Jim and Toni, as well as Jerry Bickel, were great hosts. First class people for sure.