Need larger radiator for 71 C10 with L6

[Carl Spangler]

Greetings

My 71 C10 with 250 needs a new radiator.

It has the original size (2 core?) thin radiator. If I'm going to replace this radiator I'd like to add some capacity. What size would fit in this truck? Would be nice to replace with a 3-4 core radiator.

Here's the radiator that's currently in the truck. I'm assuming it's either the original or an original-replacement.



The two top tank hold down clamps are spaced 26.5" center-center.

thanks