360 year differences

Well, I got them both. The guy wanted them gone, and I got them both for $75. :) Here's the casting# run-down:

Engine 1: block: 3418496-4-361
heads: 3671587

Engine 2: block: 4006830-360-5
heads: 3769974

Engine 2 has the heads off, and the cylinders look really good. Engine 1 is complete- I pulled a valve cover and cleaned lots of sludge to get the casting#. Both have rear-sump oil pans. What do I have here? Any good? What are the differences between these two engines?

I have a set of heads that I bought a few years ago, casting# 4323345. They have the 360 designation on them. They have been ported quite a bit, have 2.02 valves with the chambers worked to unshroud the intake and exhaust. These were the heads I was thinking of running. I'll probably follow one of the build-ups on the 360 build thread on here. What do you think? Thanks for all the help!