Good stuff man! Getting new parts is always a good time. The inside of the oil gally looks just fine, no worries there. Make sure you pick up and new gasket. Also when you route the lines for the oil cooler (if your using rubber lines, also don't think the single line you got with the cooler will fit, I have another line you can have, pay for shipping and its yours if you want it. I opped for the SS line.) Be sure to keep them away and taught so that they don't touch the header. I got the same cooler, used 6 zip ties to attach it to the frame rails. If you haven't already cut the front fender apart in the front. (cut a 3" or so section out of the plastic right under were the hood covers. Use a razor blade. It will have no effect on you fender mounting and allow for the whole cooler to be hit by the air)
Also if you want to test the block off and you don't want to take the fittings out. Blow air through the back tiny hole in the gally and the air should only come out of the bottom fitting on the front, if it comes out of both, you gotta take the fittings off and re-block the gally with some liquid metal of something similar. Its always best to check but I'm sure its all set up just right.
One more thing, when you fill it back up with oil, put in the exact amount, run it for a minuet or two then add some more to make up for the line and cooler space. And remember when you do oil changes the the added space is there now.
