[FWB]

i'll agree on the thermal expansion of the steel and aluminum heads are different. i use the felpro 1020's too, you mentioned a sealer on the gasket? like what? being i've had the heads off twice and both times i reinstalled them at 100 ft\lbs. i have the heads off again now, to be reinstalled next week and now i'm questioning this torque spec myself. (long story on why i have pulled the heads so much)
where i agree on the"just recheck the torque", but that is easier said than done with a T&D rocker set up, the girdle covers the head bolts, so its a complete valvetrain disassembly just to recheck torque. the closeness of the cly's on a 427 makes me leary to drop my torque numbers. KC racing recommends the 100 ft\lbs and i lean more on what they say over ARP. i have used iron heads on these motors for 25 plus years but this is the first aluminum head motor.