Which years had the 59-60 inch rear axle width with 8.5 Gear Ring?
 

Hello. I'm looking for a 59-60 inch rear axle for my 51 chevy car. I believe the S10 4x4 fits this right. But does it matter if it's a Blazer instead of a Truck? I am getting conflicted reports. I want an 8.5 ring gear (not the 7.5) and a 3.42 ratio. Which S10 would work? I'd even prefer the drum brakes for this axle.

Can you help me know what year, make and model I would need to search for? Some people say the 95 and newer. Others tell me the early 80s S10 and GMC 215. Others say the axles without the ZR2 but apparently the ZR2 is around 63". My biggest issue is making sure the axle is the right width and that is the hardest part to know for certain. I can find axles online that are S10 with 8.5/3.42 but I keep finding conflicting info that makes me wonder if it's really 59-60 inches.
FOR EXAMPLE: I am looking at a 99 4x4 Blazer (8.5/3.42) without the ZR2 option, and has disc brakes. Will this be the right width of about 60inches? When I punch in the VIN it says that the "track width" is 55.1
Does that mean the axle width (from brake plate to brake plate) is that? Or might it still be 59.5 inches wide? Does the 99 Blazer 4x4 have a 60" width?

I don't want to hassle with getting the wrong axle. Like I said, I can find them with the right ring gear and ratio, But I am not convinced that what I order will be the right width. Thank you.

Here is a quote I got from LKQ. The ring gear and ratio are what I want. I just want to know that it is the 59-60" width axle. It's from a 99' 4x4 blazer. Since it is without the ZR2, it seems like it should be the right fit. But I am still uncertain and would like some more input. It has disc brakes (not drum).

https://cimg7.ibsrv.net/gimg/blazerf...b5825dae55.jpg
Will this be a 59" width since it is without the ZR2? I am only trying to confirm before I order today. Thanks.
Here is an invoice I got from LKQ for a potential axle I might buy. Is this the right 59-60 inch fit?