Here's what I gleaned from the ACL book:
70-ton Airslide (88900-88919) - American General (6 30" round hatches, single compartment, 14'-4" high)
70-ton 2-bay (86100-86999) - PS (8 36" square hatches, 2 compartments, 12'-10" high)
70-ton 2-bay (86700-88099) - identical to above except built by ACF (12'-10" high)
70-ton 2-bay (88100-88399) - identical to above except 12'-11" high
70-ton 2-bay (116000-116567) - reconstructed by Chicago Freight Co. from PS cars, but with 8 30" round hatches
The Weaver undecorated AC-2 hopper looks like a match for the ACF cars.