It's a Good Cast!

Finally got the the timing gear cover off to look for the casting numbers (the 010/020 numbers).  It turns out this block is one of those rare high nickel/tin content, 2-bolt main blocks.  Once I got all the components and brackets off the engine, I discovered the cylinder head gaskets and the timing gear cover gasket are leaking (possibly the intake manifold gaskets as well).  It was necessary to determine if the block was good to reuse to see if it was worth the effort to repair the seals.  Even though it's a 2-bolt main, it's a strong cast and converting to splayed main bolts would definitely make the block worth-while.  Going to make an appointment with a machine shop to discuss options with it and prices for a clean-up/rebuild.  We'll see which is better...  Crate engine, short block, long block, bare block build, or the rebuild.

Oh, and the verdict on the radiator support is that it's dead...  New one ordered.