Good to know I can swap ring gear and gears inside the 12 bolt housing. For now the 3.07 gear is good enough to use. The important thing is I now have 5 x 5 bolt pattern on my van - no more 4.75 by 5 size!
I also found out the ratio gears were stamped on September 1974 ... so it does match the age of the van where I got the axle, the dates looks to match all round by parts. The van obviously retain much of its original parts on it.
A shame that the van is so rusty - it was an old vanner's van. Someone swooped the fender emblems and what looks like corvette waving flags above the emblems. I can see the shadow lines on fenders.
1971 Chevyvan G10 panel van - going to be put for sale
1975 GMC shorty panel van - trying to fix to save her!
1963 Mercury Econoline project van - coming
1986 Ford Mustang LX hatchback - in use for commute, poor car!
“You cannot dream yourself into a character; you must hammer and forge yourself one.”
James A. Froude (1818 - 1894)