Pick1, you may want to read this Tech Tip: HO52/72 gearing upgrade

Per the beginning of this thread, it is my understanding that 3.73 was not an available gear set for the HO52/72 axle. The truck you are going after is likely to have a 4.10 gear set.

~ John

A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult.

1949 Chevrolet 3804
In the Legacy Gallery | In the Gallery Forum
1973 IH 1310 Dump
1963 Kaiser M38A1
2001 International/AmTran RE3000 "Skoolie"
2014 Ford E-350 4x4 (Quigley)