I am also using a std cab long box. Only problem i have found was after mocking up the cab the engine sat too far forward in the engine bay. The waterpump was into the radiator. We solved this by moving the cab rearward about 3 inch. The centerline of the front wheel opening is now actually 3" rearward of where it should be. We found this to be a more pleasing appearance because if u note it appears that the stock wheels sit forward in the opening. We solved the problem of narrower rear axle by narrowing the box as necessary (about 5") This didnt change the look from the side at all, from the rear isnt bad, and you have to make new running board mounts anyway. The intereastin benifit it the look from the front. The stock truck seems to "fatten" out at the rear. Now we have a nice smooth straight line.
