Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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The '68 8 bolt (wp) timing covers and the '69 -70 11 bolt (wp) setups use the same crank pulleys and if factory a/c pulley is being used, the supplemental "843" a/c pulley is needed. If you have a working correct '66-68 impeller 8 bolt waterpump and the '68 timing cover is in good shape, might as well grab the correct '68 two groove '68 waterpump pulley. last three digits are '886, I may have one. Having put together multiple dozens 11 bolt "conversion" timing chain cover and bracket pulley changeovers for '65-68 Pontiac owners, it's no advantage to go this route if the engine is just a temporary, and you are not determined to need the 11 bolt wp and '68 + damper. Many times, this need has been tied to having to run an SFI damper and either an aluminum waterpump or Mezeire pump, many more times, have supplied everything, as owner had nothing, or was converting from manual steering.