410 Compression Test and tuning.

WOW!!!
I'm blown away, TX Dart came by today and we spent a couple hours tuning on the car. He came by after visiting his Mother and had to drive 15 mi extra North just to get here, which made for an extra long drive home...we got a late start but what a great favor!
Super nice guy!

We got a base timing to start from, set the floats and played with the mixture.
The car was way overtimed.
For the start we used the dialback set to 36° at 2800rpm which put us at 15° initial. We only had time for one test drive and the car ran MUCH better, but got up to 240°F on the highway, we made it back but had to call it a day. We know there is much more to do, but we had to let it cool and ran out of time. We didn't have a chance to mess with the distributor or check the whole curve.
We are leaning towards the problem being the 2 row 22" radiator and 6 blade clutch fan is just not up to cooling this engine. Curious if you folks have any more insight or experience with this problem?