[rickpilgrim]

The water pump is the correct rotation for the 1972 engine and we run it with the 1972 brakets etc.
Update- Yesterday we ran it, it was about 40 degrees here, and around town it never went past 210. but on the way back we took the hwy and hit 240. I talked to my machinest(do his lawn/snow also) and he said with the heads he had to hot tank them twice as there was alot of whit/yellow scale that did not all come out on the first time through. If that stuff was in the heads cooling passages, It must be in the block also and that would act like a barrier to block the heat from the coolant. when we got back we let it run and used the infared temp finder and hear's what we found.
Rear right of block-295
Left rear of block-305
oil pan-226
left head rear 292
right rear of head-301
front left head- 291
right front head-300.5
water neck-240
water pump inlet-165

All this explains alot to me about this problem, And with the main bearings starting to make noise I dug out the old 350 4 bolt that we saved and with the help of the machinest were making a long rod vortec head 385(.060 bore) and leave the 400 block in the corner for another day. Thanks for all the help, I appreate it!