It's a little tough without seeing what you've got now, but something doesn't quites sound right here. Apparently you're having some cooling issues? The stock inner fender panels on a '36 are largely louvered as is...........your's modified? The bottom of the firewall needs to have the 45 degree slant of the toe board, that also aids exit airflow. A third thing on the '36 that aids in air flow for cooling is the panel at the bottom of the grille/radiator. Often these are left off because they are a pain to reinstall when the front sheet metal is bolted back on, but they make a difference.