my 57' build

[gotmotors]

Reading this thread put a big smile on my face because at age 13 you're getting into a great hobby. Good for you! You are going to be the envy of neighborhood when you get that thing on the road!

Your 327 heads have numbers cast into them under the valve covers that will identify them.
Check here:
http://www.nastyz28.com/sbchevy/sbch.php

Steering columns are pressed into the steering box and I think you're right about the pin. There's a thread here somewhere where a guy was able to tear it apart and reassemble it. It'll help you a lot if you can find it - lots of detail.

I'm in the "keep the 327" camp.