Nothing to speak of really maybe 2-3 degrees of variation moving across the core in a row type pattern. I am thinking I need to sink the fan in a little closer to rad after looking more closey at things.

I would also like to get the trans cooler mounted independent of the rad core, I cant help but think that would help.

Also looked into different pulley diameters but I am not seeing anything out there in a stamped steel, stock type water pump pulley other than what was on all big blocks of that era. I need to research that more.