I found this over at Roseville's website. I'm not concerned about "correct". I'm making an ASSUMPTION here that the #2078 (70-71 B/E body big block) is bent differently than the #9246 (66-69) or #2840 (64-65 B-body or 65-68 C-body) due to differences in their exhaust manifold shapes or something like that. Is that right?

http://www.rosevillemoparts.com/images/p...orrect-9617.jpg


They all bolt to a motor mount bolt, right?

I'm sure I'm over thinking this, but could I use ANY of these? I've got a '73 block in a '70 car with headers. Will they all be accurate? Will one clear headers better than the others?

Any ideas/tips are appreciated.