Ford factory Z bar.

Unknown fitment.

Looks closest to 70-71 Torino big block.

Large diameter main tube is 6 5/8" long and 1" I.D.

Main tube is not the small diameter as used in small blocks.

Upper arm stamped S4J and lower arm stamped S4H.

Ford factory Z bar.

Unknown fitment.

Looks closest to 70-71 Torino big block.

Large diameter main tube is 6 5/8" long and 1" I.D.

Main tube is not the small diameter as used in small blocks.

Upper arm stamped S4J and lower arm stamped S4H.