Opinion off the internet....
You really need to keep the water moving at all times, even if it's just recirculating in the block as the existing system does when cold. One good reason for setting it up this way-- it minimizes hot spots, and the circulation warms up the block more evenly than would be the case with no circulation.
That said, some control the pump speed based on RPM and/or Temp Differential so you still need a controller for that.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
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