[Kasman]

Thanks to all for your informative responses....I am resting earier about toasting this puppy.....

Some more facts

The block cleaned up at 0.017" over
I am running an Edlebrock water pump
The timing is at 36 degrees full advance, the engine builder recommends 38 degrees
The air/fuel started around 12:1 now has been adjusted to around 13:1 to 12.7:1 from 2000 rpm up, reading during chassis dyno.

Before I tear into it I will try....

The 50/50 mixture for the coolant
Vent from the highest point to remove any possible trapped air

Then....

Change the thermostat and install a lower temperature automatic fan switch or a manual, dash mounted, toggle

I assume that with the small engine compartment and the low profile of these cars the heat cannot vent well unless they are moving at speed...

Sound like a plan?

Thanks again

Kas