Thanks so much for the info.  My knowledge on Olivers is very limited.  I've done many John Deeres.  My father-in-law has always had Olivers and I've done repair on the later models, since he retired from farming years ago, they are gone.  However, he kept the 1957 Super 55 he bought new, purchased an 1941 60 RC, a few years ago.  I resored the 55 last year an now the 60.  I may have more 60 questions.  Thanks again, Ed