These are on the rear of my 84 xtra cab pickup. I bought the truck used and the PO didn't know much...lol..

 

Those would be Malaysian brand leaf springs. Made by the proud hard working citizens of Malaysia.

Fun fact:Situated between 2º and 7º to the North of the Equator line, Peninsular Malaysia is separated from Sabah and Sarawak by the South China Sea. In the northern part of Peninsular Malaysia lies Thailand, and in the south, neighbouring Singapore. Sabah and Sarawak are bounded by Indonesia while Sarawak also shares borders with Brunei

 

That doesn't seem to help much...hahaha...
Dakkar springs are made in Malasyia, but I don't know if these are that brand.

 

My Pro Comp springs came with red bushings and I think the Ranchos do to.
Maybe its one of those brands. My springs don't have any of those numbers on them though.

 

http://www.autopartswarehouse.com/pa...W41260599c6350

i googled the number and got lucky. im not positive but it is your springs but it seems likely

 

Those sure do look the same. Thanks bone collector.

 

lucky guess.. but your welcome