what is the difference between a h052 and a h072
The size of the brakes and the gear ratio.
The 4.10 is hard to find and will swap right into either housing so if it really is 4.10 you've a great find!
Can you post exact details of the donor truck?
1969.
Chev or GMC?
Auto or manual?
What motor?
These details may help others looking for this diff.