Doug,
I see you make no mention of the alternator or bracket for it. you'll find that the pivot bracket won't line up with that 11 bolt timing cover you have on there now. There is no depth difference between the 68 and back 8 bolt timing cover and the 69 and up 11 bolt cover in regards to the balancer. You've got two choices, one is to put the 68 8 bolt cover back on so your waterpump neck sits at the correct height and use the corresponding 68 water pump pulley -- that will give you the correct spacing to line up with the PS and alt. If you stay with the 11 bolt timing cover, you'll need a late 69 or 70 WP pulley but remember that the front alternator bracket will still not line up on the 11 bolt cover to match the back one since the bolts are in different locations. Not a big deal, but it will track at a different radius than the rear strap that bolts to the thermostat housing bolt. You can modify the bracket by cutting off about an inch, redrilling the hole, heating and bending the bracket into a tighter radius.
I can't recall the correct late 69/70 part number on the WP but I know it ends in "130"! The 128's and 129's are different diameter pulleys but at the same depth so you have a few to choose from.
Later,
Dennis
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