ok another dumb question

[68GMC454]

ok i have listened to you all talk about swapping front cross memebers..which is the way i want to go..i think in the long run,,parts will be easier to find to..but any way the question i got is this,,i got a freind who was going to redo a 59 gmc,,but like all his other projects,,has lost interest after stripping it to the frame..would be a good truck to redo but any way,,he got a van for free,,and listend to me and got the rear end and the complet front cross member...will a late 70 van cross memebr work..is it the same as the pickups..i hope so,i can get it all for free,,well not the pickup,,but i think thats next on the list this summer if things go right...just need to know if the cross memebr will work..