Blazin,
TheCJ's from early 70's to '86 had
2" wide fronts, centered hole, 45" long
2.5" wide rears, centered hole, 45" long.
There were 5-10 leaf variations depending on load rating, all "springs under" configuration.
The YJ's ('87-95) came with
2.5" wide fronts, centered hole, 45.5" long.
2.5" wide rears, centered hole, 45.5" long.
Both came in various 4-7 leaf configurations, depending on the application load. I've had 4, 5 and 6 leaf YJ springs as stock for my 8 and 10 leaf, SOA CJ8 spring packs.
I know some of the Waggie springs were hole off centered and quite a bit longer than the CJ/YJ springs. The Jeepster rear springs were the longest of all, hole off centered. I have a lot about Jeep leaf springs on my website, you might peruse.
http://homepage.mac.come/jefe/
Am I suspecting you are in a non-jeep application? If so, go to the junkyard and bring your measuring tape, as there are a lot of varieties out there. Scout are too narrow. Land Cruisers are a metric size and don't translate well, FS are generally too wide and stiff.
regards, as always, jefe