Ron, The CGW 85000 and 89000 series box cars came with Dalman 2-Level trucks (available from Tahoe Model Works). However, the 87000 series cars were built with Coil-Elliptic trucks, where a leaf spring is centered between the coil springs (also available from TMW).

Those leaf springs worked fine as long as they stayed lubricated, from what I've read. But they tended to dry out and were removed in later years, resulting in a double truss truck with a wide gap between the springs (and also from TMW).

Brian Leppert
Tahoe Model Works
Carson City, NV