Awesome !! Wish I could stumble onto a find like that!

There are a couple of forums that may help you with information on using your 302 in a civilian application, or aid in selling any unwanted military accessories:

https://forums.g503.com/viewforum.php?f=26&sid=d24d3e3d5e4d29a19e62b152b2f69fbb

And:

http://cckw.org/forum/index.php

The second website also has a nice page that talks a lot about interchanging 270s and 302s:

http://www.cckw.org/270_to_302.htm

It is aimed more at putting civilian engines into military trucks, but it still contains a lot of good information.

Good Luck !!