Ld 340 intakes

Lol guys,,well it's going on an h code 73 duster I'm trying put back to original. Needless to say it came with ac. I have an all original 68 340 drivetrain I'm planning to place in there. That's why I was thinking of swapping the original cast intake to the LD. so what would be my second option intake to keep the ac on,and in that era?