Well, torque pattern has more to do with how many lug nuts there are, than the age of the axle. Check the HTF library, this subject has been addressed several times. Furthermore, if needed, you'll find torque values in the 1969 Operators Manual, again in the HTF Library. Those values are probably the same for your 1965, as I believe the same axles were used for many years.
1967 17' Hi-Lo Bon Voyage (1967-1969)
1969 19' Hi-Lo Bon Voyage (1969-2011)
2004 27' Hi-Lo TowLite (2010-present)
2015 Chevy Tahoe LTZ