Well, good and bad news....

Bad news is I found a huge leak while pressure testing right under where the exhaust flange is where the case comes together.  Also a slight leak at the bottom of the cylinder as well.

Good news is that I found the problem and now I can take the proper steps to fix this.

Do you guys think I should try and find a used bottom end and just swap it out?  The one I have has all the paint stripped off and looks kinda cool like that.  I have a friend who runs a shop and will redo the seals with me for 125.00 but I have to buy all the parts and such.  Maybe I should buy the tools and attempt myself?  I guess i'm at a crossroad of what step to take next and would love some advice from you fine folks.