http://www.socaljetboats.com/random-boat-parts/460-headers-22328/msg256714/#msg256714Don't know if this is what you're looking for but....here is some.
Bassett has a blem set of twisties that I looked at, 1 header has a really small chrome issue in between some pipes and couldn't find the problem with the other for I think 795 with lines & t valveSent from my iPhone using SoCal Jet Boats