Run stand questions

Looking to build a run stand.

The starter is the big question. I was looking for bellhousings but it seems they cost around 150. In the how too thread i saw a custom bracket. I'm assuming he made it. Does anyone know where you could buy one?

As i was rummaging through the garage, I have a 5.7 hemi flywheel which is the same as a 4.7 that i have. Obviously the crank bold patterns are different but the old school flywheel torque converter bold holes just about line up. Crank center line too. Has anyone experimented with this?

TIA

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