LS header flange angle adpater?
Something like this:

Don't how your headers are welded but many are welded on the inside of the header flange towards the cylinder head. Could you die grind out the weld and move the headers as needed and then reweld on the inside? Mod would be invisible.
Oh and the Vikings are trailering by 7 but on the move?
Cutting and grinding or adding an angled flange is overkill for a few degrees.
Bolt it to the head and bend it. If more is required, heat the 4 tubes and bend it. Ratchet strap, chain fall or scissor jack.










