HEI distributor...

Well, originally $55, but $50 would get it now. The super coil had the case top corner trimmed back and some Ultra Grey smeared on it (It's an E core coil, so no harm done) to get it to fit in a second gen truck. But you can get a little better idea of the overall size here.
[FOR SALE] - Small block HEI distributor
Hope this helps!