'68 GMC w/ '86 subframe & SBC; what headers have you used with success?

[nikwho]

I am curious to hear from other folks with 67-72 Chevy/GMC pickups that have 73-87 cross member swaps. What headers have you used that fit well? I am not sure of differences in the 73-87 cross members, but seem to see the '81-'86 trucks separated often from the other years. If the cross members are different, that would be good to know. If possible, I'd prefer full length. I figure that the cross member swaps are pretty common with these trucks and lot of guys run headers, so I would like to not learn the hard way what will and won't fit. Im not sure what other details are relevant, but my truck details are as follows:

'68 GMC
1986 Chevy C-10 cross member/suspension swap
drop spindles
drop coils
factory 4 spd, now th350 w/ column shift
factory A/C
350 SBC w/ 190cc ProMaxx aluminum angle plug heads

Any help would be greatly appreciated!

Nik C.