Two diametrically opposite axles. Yes, 99% of the 65s had 8" removable carrier rears in them. 8" axles are retained via pressed on bearings and bearing retainers. The late model has an integral carrier rear (like the chebby 12-bolt) with the axles retained via an inboard c-clip at the very end of the axle (cheaper to manufacture). If an axle breaks on a c-clip version, the axle is no longer retained and that is bad. Race organizations require c-clip eliminators vor this reason.
If an axle breaks on an 8" or 9" the outboard bearing and retainer keeps the axle from going anywhere.