Rattletrap,
I am not sure. I always have to remember their are folks who what to restore to factory, so sometimes the advice doesn't apply.
As I look at the pictures in the Chev's book, all the two stage pumps are assembled with screws. I think any auto parts store would be able to supply you with the proper pump, probably put together with screws just like from Detroit.
Any rebuildable unit would probably not be crimped, or mashed together...just screwed!
Your local auto parts store might surprise you on these items. You think they are for your old Bolt, but they also fit a bazillion other things, and the stores, or warehouses, keep them on the shelf.
Stuart
