[Steeveedee]

Not sure why you'd want to change the cross members out, unless they were rusted beyond repair. I will say that the rivets provide tons (literally) more force on the parts held together than bolts do. If I ever had to change one out, I'd find a way to have them riveted again (or maybe even welded, if I couldn't rivet them). You'll certainly see differing opinions, but this one is all mine.