I assume the A6 came from the Oddesey? Could you swap the higher flow oddesey intake and manifold and place them on the F23A5 block for the simple reason of keeping the cubes high?

Would an upgrade to a newer style F-series non-vtec in a Gen 4 chassis facilitate the splicing of any wires? That would make the swap easier then an H, right? However, I think I recall someone installing an F23 into a Gen4 and the motormounts don't mate perfectly if I recall.