Chuckey,
Look at the back end of his comb in the third pic. See that bump sticking off the side? That's a side sprig, and is a DQ (disqualifying fault) in ALL breeds. Not a good thing to pass on to future breeders. Also like the others have said, he has an extremely short back and Squirrel tail. Getting a better roo to use will save you much time, and wasted effort and money! Too bad too, he has lovely coloring; that always seems to be the way...
As APA judge, Troy Laroche, told us at the clinic yesterday, colour is easy. The DQs are DQs for a reason - and your boy has 2 biggies. Sprig and a squirrel tail. You really shouldn't consider breeding him. However, if he is all you have to work with you can give him a try but if he spits out junk, be prepared to cull him and the offspring later and start over. You probably aren't doing yourself or Marans fanciers any favours working with a bird this loaded with problems.