Intake cooling mod. Opinions wanted

I see where some guys are drilling out the back of the intake manifolds and installing fittings to run a hose accross the sides to connect the rear coolant ports of the heads. What do you guys know about this mod? Is this considered a race mod or is it valuable for a street engine also? My 360 with a good 3 core rad. runs 200-210 in the summer months. I'd like to lower that if possible but there's not enough room to go with a 4 core rad. I was also thinking about adding the flow cooler disc to the water pump. Anybody tried one of them yet?