What Have I Got?

Thanks, Folks. I now have a better picture of what I'm dealing with. My friend Stuart sent me a few links to the tables I'd hope to find here (one of them is from here).

http://www.mopar1.us/Aengine.html
http://www.forabodiesonly.com/mopar/showthread.php?t=226737
http://www.mopar1.us/headcastnumber.html

Bolt size is 5/16". How screwed am I? I just got off the phone with Edelbrock and the tech guy says "no bueno" for an intake. Same with Jeg's and Summit. Offenhauser wasn't sure what would work and I expect their prices are nasty. See my other thread for questions on modification details: http://www.forabodiesonly.com/mopar/showthread.php?p=1971014634#post1971014634