small block to big block headers 1977 k10 ?????????

[BIG77k10chevy496]

hi im a noob to this forum and I just swapped in a 496 stroker (454) into my 1977 k10 with th350 long box. it used to have a 400sbc with headman headers wich fit perfectly, but this motor came with long tubes from a early 70's t/a wich clear the crossmember but drop a few inches to far and won't clear the bulge of the transfercase. I then baught some flowtechs p# 11530-flt wich dropped waaay to far and the crossmember cuts right across the collector exit.
im obviously not the first one to put a bbc in a sbc half ton truck so im wondering what other people used for headers.... sorry to ramble but tried to give the max info possible.
thanks in advance!
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