How much do the heads from a TBI 305 weigh each?

I took apart my LT1 heads and they weigh about 20lbs. I'm trying to figure out my weight savings from a k-member, LT1, and a few other things

50 lbs. ea. for the cast iron heads, roughly.

Stripped down an L05 head weighs 46#; the LO3 TBI heads probably weigh the same. Later heads like the L31 head weigh 41#. The info is per this thread.

Fully assembled L98 head = 50lbs each. I'd assume this is VERY similar to any other SBC head.

Bare LT1 head = 19lbs each.

Just about 60lbs weight savings (a bit less when you add weight of LT1 valvetrain). Not too shabby.

I can get an exact weight of an LT1 head with stock valvetrain components tomorrow. Waiting to find time to install them on my 305