4.375 h190 diff, 620 axles

[troyt]

An aluminum housing H190 rear diff with 4.375:1 R&P out of a '72 620 pickup. This is the gear set you need for your 510 wagon if you're running a 5 speed in it. Easy swap instructions available on Ratsun. $100

 

Two 620 axles, 6 lug. $50

[troyt]