47-59 Bell Housing

[bjinx]

I have this early chevy iron bell housing #3776887, dated A239, I plan on selling. I have been all over the net, but am having trouble identifying the years, this bell housing was used. The closet I found was one for sale that said it was used on 1958-'59 Chevy and GMC trucks.
The two top trans mounting holes are threaded and the side mounts have one threaded hole, with bell housing starter holes The input hole is 4 11/16".
Any help would be appreciated.
Thks

Was going to add a pic, but for some reason it won't let me down load it.
Size wise it is in the parameters for a jpeg.