Newer valve covers are plastic for the 3L's with the waterpump drive on them. Basically if you go with the 3L w/o the waterpump drive you need a set of valve covers too. I've got some for sale and can powder coat them again if you like too.
Rick
Owner of 00 #1611 Silver (Totalled) 98.5 T-Red SVT #6180
Buckshot77@msn.com
Misc 3L parts for sale