For one, here's where I mounted mine:
I wonder if the effort of running all that extra hose to mount the exchanger in the rear would be worth it, but I guess that's a decision you'll have to make for yourself.
Secondly, you may have seen where I am running excessively high oil temperatures at times, even with my cooler. This month's (Sept) issue of Chevy High Performance
magazine has an article dealing with aftermarket oil pans and the power losses and associated heat generated by the crankshaft whipping the oil around.
At one point they mention purposely running the stock pan two quarts over the full mark and seeing an increase of 46įF in the oil temperature. I wonder if you're tossing the oil around enough to cause a windage problem. It's a possibility I guess.
If you plan on doing a lot of road racing, you might want to look into a bigger pan with windage trays and scrapers.