Looks like Sidewinders to me
Dynoed a plain 440 last week-- hyd cam , crappy torker II intake, stamped rockers--Nothing fancy --Sidewinders--made over 530HP --nice street engine EASY AS PIE--Bolt them on and Roll
Me Likey Sidewinders--
Got them from Marsh Performance--NICE valves, all Comp hardware--Bolt on a Rock! Yahoo!!! No cheapo componants--came assembled ready to bolt on.