On my pr stocker-I ran an edelbrock alum pump with a moroso belt drive to a little 12v motor-it pretty much just circulated the fluid to even the temps thru out the block/heads-

Recharged battery every run while running valve settings and other work-refueling cell every 2 runs, tire service----ran a 110v fan in front of radiator and would run the 12v moroso every now and then to circulate h2o to radiator ( VW alum rad)

Only thing running on front of crank was ign cranl trigger pickup---don't think that was much of an load