Oh, when I referred to the "post 59" block.... I was thinking in reference to the coolant flow and not the side mounts that appeared in 1959. I think I have that right:
1959 - First year of side mounts, last year of "gusher/reverse" coolant flow
1960 - First year of "normal" coolant flow. Has side mounts, but timing cover is strong enough and has mounting surfaces (I think, if different than later years) to use as "chin mount".
Do I have that right?
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Tribal Tube Header Rip Off Victim. Ordered March 27, 2012. Told 3-4 weeks. Still waiting