Bagged using stock steering arm??

[randomhero472]

I'm looking into bagging my 67 c10, and never even thought about having to use one of those 3 peice steering shafts. My question is if i were to use the stock control arms, leave the crossmember alone, and basically swap out the coil w/bag can i use my stock shaft? also anyone use slam bags on their trucks, if so what size (height) bags did you use front-rear, thanks