I've had these 351C heads molding away in a corner that Dave Williams built for me. Just a standard set of high compression heads, stock sized valves in single piece steel. I don't expect this engine to go above 5500RPM especially after what it's been through.

Here's my pleasant Flickr set

I floated some valves and there was some (a lot) of contact between the valve and the piston due, I assume, to spring wear and perhaps sticky valve guides. Twisted the pushrods into pretzels. I took the pushrods out to get home... unwittingly causing the lifters to pop out with resulting loss of oil pressure (about 5 lbs). Dave's heads look awfully nice, so I'm putting them on with some Victor Reinz gaskets. I'm also installing the intake manifold that Dave prepared for me with bungs for 16 fuel injectors.

The engine is serving as a test mule for some EFI experiments, and I figure it will last a few thousand more miles. I'm checking the ZF for safety wire on the ring gear, painting the engine and the engine compartment, weld new bungs to the gas tank (it's one of the aluminum ones), and replace all the bolts that have "gone missing" over 35 years. Maybe I'll toy with the AC too, but I really want to drive this thing again before my tires rot.