There is no V8 bell housing with the fulcrum. The 55 V8 truck used a completely different configuration as Bill mentioned previously. The V-8 design was incorporated for both in 56.
The V8 side cover has a long shaft to the rear (1-R) and a short shaft to the front (2-3). Both levers point down and slightly forward. There is a completely different 2-3 shift rod that is one piece. The shifter box on the column is also different as it has a dog leg on the 1-R lever to clear the left exhaust manifold. The 6 cyl shifter box may possibly be used.
I have some of these parts as I have rebuilt a number of these transmissions and have a variety of side covers. Send me a PM and see what we can come up with.
Fred