Taking the lead from Jim Sims and others, I installed a fan in front of the evap resistor intake, using a slightly different method, in an effort to increase airflow through the vents.
I had intended to install a 74CFM computer fan....but couldn't resist trying the new Spal 4" motorcycle/ATV fan that I was planning to install on the rear condenser that delivers 124CFM with an amp draw of 1.9. Build quality and CFM are sooooo much better. Only drawback is the fan noise. On fan speed 1 & 2 the fan noise is very noticable. Somewhat noticable at speed 3 and not at all at 4. I may go back and line the floor board panels with 1/8' dynamat foam for sound dampening.
I cut new floorboard panels (2) out of scrap paneling and mounted the fan directly in front of the resistor pack opening. I've got so much wiring behind the floorboard that I doubt I was getting good airflow to begin with. The using 1 x 2 stock, I built up another layer of floorboard to allow air to enter behind the carpeting. If I can't live with the fan noise, I'll swap out the Spal for the computer fan but I REALLY like the Spal!
I wired the fan to the front condenser fan so it cycles on and off with the compressor. Here's a few pics of the install.