I searched for the weight on any L-series head to give a shipping estimate but couldn't find it. Thought I would include it here for future searchable reference.
ROUGH measurements on an E88 head removed from a 240z. No cam cover, no studs.
Weight: 53 lbs
Dimensions: 30" x 12" x 10"
Keywords: E31, E88, N42, N47, P90, P90A, P97, head, cylinder head, dimensions, dims, weight, heavy, pounds, lbs.