I'm not entirely sure on this one, but don't most serpentine systems run a reverse rotation fan? Don't know if you are using the stock one or if one came with the serpentine kit, but you might check which way it turns to be sure.
Stock newer stuff runs backwards but the March serpentine system is a direct bolt on replacement for stock pulleys. Got it on my Cuda and it works fine.
Nitronut it's crazy how things work but I've seen guys run 2 core radiators with no shroud and not have overheating problems then another guy might be running a 3 core radiator with a shroud and have overheating problems. Just the luck of the draw I guess. Most of the time in a perf. application anything less than a 3 core radiator will run hot.
Things you can do that should help. Install a 3 or 4 core radiator.
Install a 180 thermostat.
Install Be-Cools water pump disc to help it pump water better and not cavitate.
Install a clutch fan and shroud if you don't already have them.
Run a big auxiliary trans. cooler on the transmission.
