1970 12 bolt axle length?

[Bamm]

You need to measure. Period. I know that a lot of guys here know a lot of things about these trucks, but I know that '70 rears came two different lengths. I bought a 3.73 posi rear out of a '70 truck and the axles were a different length than the '72 rear axles in my truck now. This was an original rear out of an early '70 truck. Suburbans, i'm not so sure about, but I know if it was me I would rather measure than take someone's word for it and buy new axles and they be the wrong length. Don't get me wrong, I value everyone's advice on this board, but I like to be sure about things when there's that much money on the line...... Good Luck........JB