Need help identifying a bellhousing and flywheel

I pickup up a bellhousing and the part # on it is 3333728. Can anybody help me identify what this was used on/in? I was told it is a SB bell and hope it is but I haven't had a chance to verify that yet. Also got a flywheel with it and would love to know what it was off of but unfortunately they drilled one of the balancing holes right over top of the last 3 numbers. All I can read is 2843xxx. If anybody can help me I'd sure appreciate it. Tracy
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