TTI header woes

Is it the headers or inconsistancies from Mopar ? My ragtop rear end is off by 1/4". I know thats not header related but who knows about the front of the car ?
With the small block i had in the car before hand, I had a set of dougs headers on it. Didnt end have to look twice they slid in and not a single hammer mark at all to cleanace anything. I see hooker is making headers now for B and E body hemi swaps. be nice to know if they are comparable to the tti crap i had to deal with.