71 350 running hot coolant backup up problem

[Stocker]

Originally Posted by Gregski

So what's next? Well I don't like how deep my flex fan sits in the fan shroud, so I picked up a 1/2 inch spacer to replace the stock spacer and move it back some.

I would throw the flex fan as far as possible and get a proper heavy duty fan clutch with a good OEM-type 7-blade fan bolted to it. That's what came on my K20 with a 350 and factory A/C. In 41 years, the only time it ran hot was when a clutch unit failed and I tried a flex fan. Didn't take me long to get rid of it and put the right one back on.

Just my 2 cents...