I didn't have much trouble fitting the headers with my 5.7 swap, but I agree that tightening the bolts is unpleasant at best. The main issue with the hemi is that the heads are dang near sqaure shaped as opposed to more of a wedge shape like traditional older heads. This means the exhaust ports almost point down as opposed to sideways, so you have to reach down past the head and then back up with a bolt/wrench. Added the tight tube clearances and you have several unhappy fingers.
