The Stovebolt Site Forums The Shop Area Engine Shop 235 engine noise, help needed!

I have a new to me 58 Apache with a 235. From what I was told by the previous owner, the 235 was a good running engine that sat for 15 years in a dry heated garage. He bolted it in the 58 and but never completed the rest of the install and therefore never started it up. I recently purchased the truck completed the 235 install and got it to fire up today. It starts and runs but is making a knocking noise that I don't feel sounds good. I do not have the exhaust hooked up yet so I am wondering if that has something to do with it. I have a video of it here:

http://s824.photobucket.com/user/keenebolter/media/58%20Apache/Video_zpslflnottw.mp4.html

Though I was able to get the thing running I do not have alot of engine experience and was hoping those that do might be able to listen to the engine in the video and give me some guidance as to what could be making the noise and how to go about fixing it. I have my fingers crossed that its a simple fix.... Thanks in advance for any help!