When I did my beefing of my first one, I found out that the shock for a 85 S10 2x fit.

S10 2x Rancho RS5222 specs.
Compressed Length: 9.050
Extended Length: 13.810
Travel Length: 4.760
Lower Mounting Code: XP11
Upper Mounting Code: S4

Stock Monroe for a Gen I/ 2xS10 (NAPA 94001)
Compressed Length: 8.625
Extended Length: 13.375
Travel Length: 4.75
Lower Mounting Code: XP11
Upper Mounting Code: S4

Stock KYB shock for a Gen I/ 2xS10KG5603A
Compressed Length: 8.86
Extended Length: 13.39
Travel Length: 4.331
Lower Mounting Code: E3 (same as the XP11)
Upper Mounting Code: S4

So even shock manufacturers vary with the stock specs. I used the load adjusting 58260 on the front and with my T-bars cranked I never had issues. Less bounce offroad but more effort to get them in. Food for thought on this