I took mine out, cut it in half(long ways) right above the weld seem. I had it sand blasted, welded, pressure tested, and powder coated, for around $250. Looks better than brand new. If you do this, just make sure you take compressed air and run a nozzle in one of the holes to constantly have fresh air running throught it. It may go boom if you dont.
The reason I brought this up, is I have a white 73Z, and I saw a die cast model of a white Z with a black hood, I thought it looked pretty cool. There are lots of late 60's muscle cars also with flat black hoods.
What a thread, Im just about to start the conversion. I had a guy who claims to be a Z expert, say I needed to cut the drive shaft to get it to fit in between the manual gearbox and the diff. I guess this is not the case since no one has mentioned it. Thanks for all the info