A leggy streamlined pitbull. If you want rougher breed to a long line straight up leggy athletic working pits. Just my opinion but thats what I would do, u may loose a little nose but i dont think you would loose much range or hunt.
x2...preferably an established line of APBT of what Justin is saying...you might have to weed out a few culls because of the cross...and selecting the right pups correctly is the other half of breeding better dogs...a good APBT is a gamey dog so it should work...I have known of a few that were outstanding dogs...one was 1/2 plott and the other 1/2 walker...