Pioneer 3.5 TS-A878 or 879

[Mike Swentzel]

Hello everyone, I've been eyeing these Pioneer 3.5 speakers TS-A878 or newer model 879. And was wondering if they fit an 87 GN, Crutchfield says they don't and don't wanna fork over money or try reselling if they don't fit. Any input would be greatly appreciated. Thank you Mike