35% off SpeedMaster

Looks interesting enough.
I've been looking for a pair of alum. heads for my 11.3:1cr daily 360ci and I was leaning towards the Todd March setups.
I'm still on the fence about going with alum. heads to replace the small valved '302's on it now.

Since the engine is a daily driver, it only occassionaly sees any action above 4000RPM.
I'm wondering how much (low rpm torque) gain the 360 would see, if any, with every day driving and short acceleration bursts.