This is a used original water pump pulley 351680 AA for small block and big Chevrolet engines according to online sources. The pulley was used from 69 to 74 on both small block and big block engines with air conditioning.

The pulley is listed in the parts book under Grp. 1.062.

The front pulley is 6 & 1/8 inches in diameter, the back pulley is 5 & 7/16 inches in diameter.

Height from top to bottom is 2 & 5/8 inches.

Fan bolt spacing is 2 & 1/8 centre to centre. Centre hole is 5/8 of an inch.

The rear pulley is deep groove.

I would like $25.00 plus actual postage for the pulley.