Gold Lifetime Member
Join Date: Jan 2000
Location: Wilton, Ca. USA
There is only one company I know of who makes headers for a big block 67-69 Camaro using small block mounts; but they're also for aftermarket heads, most of which have a raised exhaust port. I actually have a set for sale. You might call them to see if they make a set for stock heads if that's what you have. The company is Lemon's Headers. Their number is (805) 239-8998.
The least expensive thing to do may be to use the correct factory mounts for the big block, Hooker Super Comps (I know they fit) or whatever header you like, and see if there isn't a different handle for the shifter on a big block. It sounds like your shifter or handle isn't right if it's that far to the side.
The other off-the-shelf headers don't clear the ps box if you're using the small block frame pads and mounts.
As a side note, why do the Hookers and others have to be SOOOOOOOOO close to the box with the correct pads? These Lemon's headers were larger tube (2 1/8") and had at least 1/2" clearance at the box. The Hooker's although they cleared were so close I actually had the grind the head of one of the ps box cover bolts to clear.