73-87 crossmember swap with manual steering

[62stepside longbox]

Hey everyone. I'm picking up a '78 donor truck in a couple days. I bought it to use the front crossmember, rear end, 5 lug stealies, power brakes and possibly power steering. My question is can I swap to the later crossmember without using the power steering gearbox? Can I use the manual gearbox that is allready on the truck? My reason for wanting to do this is because the truck has a 235 and a power steering pump bracket would have to found or made for it. So I would like to stay with the manual steering for now. Thanks