When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I think you will be junkyard bound. I just removed all emission equipment from my 85 F250 and stumbled across one at the local pull-a-part. I beleive that they were installed on trucks over 8500 lbs GVW, F350 on up during the 70's. I found a thread here today that refers to it while seearching for something else. Good luck!