I have a Chevy Wayne Cast iron 18 bolt 12 port head that I have owned for many years and never used because the water jackets were filled with some sort of "hardblock" type compound probably for drag racing. The package included all valve train, valve and side cover, 5 carb alum. manifold, 5 Stromberg 97's. Hilborn fuel injection and front cover pump, Cast iron headers and zoomie style headers. Moon 2 gal. fuel tank. 6 GMC connecting rods. 6 Venola pistons. Crane 330 cam. What would the value of this package be now if I wanted to sell it? I would like to clean out the "hardblock" and make it streetable, but I do not know if that is possible. Any thoughts? Thanks. I currently have the head mounter on a 235 Chevy block and have it running. It goes about 5 min. before the temp. climbs too much. I have removed some the of the "hardblock" and have some water flow through the head but not enough.