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I'm running a 289 not a 351. The crank pulley is 6" & the water pump is 5 1/2". It sounds like you have researched potential problems areas. Let me share an experience I had. When the engine was first built I purchased a rebuilt (?) water pump at Pep Boys and used it for about a year. During that time I had very irradic water temps. As the thermostat would open the water temp would immediately drop to 140 degrees and then slowly creep backup and go past 180-190-200 spiking and then again dropping. Sometimes it would stabilize briefly and occasionally it would operate at 180 and then spike at over 200 and immediately drop to 140. I tried many things, but what solved the problem was the change from the water pump with a stamped steel impeller I was using, to a "NEW" one with a cast iron impeller bought from Ford Dealer. Never a problem again.
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 05-05-2005 at 01:12 AM..
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