The Black Jack Headers are hard to find since they've been discontinued.

I picked up a brand new set of Hooker Competition headers for $170. They are the 1 5/8" primaries with 3" collector. I'm kind of wondering if the Super Comps which are a lot more expensive would be worth the extra money. They are 1 3/4", 3" collector, 2" longer than the Comps. Anybody know how much a difference one header would make over the other considering this mild street 455? Thanks.