[AdamIsAdam]

I'll verify the timing mark. I assume the builder (my old friend) made that mark.

The radiator surface area (fin area) is 21x18. The outside dimensions are about 26x18.5x2.25".

Note that I only have about 3.5" of clearance between the radiator and the front of the pulley, so that fan won't fit. (I looked at it last night on Summit and couldn't find anything that would fit and flow that much cfm.)

I'll snap a pic later this evening.

EDIT: I've got a Summit order pending. In my cart:
FlowKooler 1649 - FlowKooler Hi Flow Mechanical Water Pumps
FlowKooler 330-160 - FlowKooler Robertshaw Series High Performance Thermostats (and some sort of gasket)

I don't mind adding a new electric fan if there's one I missed. If I'm gonna throw some parts at this thing, I just assume do it once. the car will think it's x-mas morning