I am now part of the lucky yard sale find Club.. I always see it but never have been lucky enough untell Sunday to find some original un altered parts. They wanted 100.00 for both the Valve covers and the Manifold but I had a 50.00 bill in my pocket and it was Still there sitting in the back Late Sunday afternoon. This was a 3 Day sale. The valve covers have a 3/4" thick flange !! and are heavy as hell for valve covers . The Corvette manifold is un altered they just used the carb adapter instead of cutting the plenum as most guys did back then.