i happened to find a company that says they can mate an LS1 T56 to a standard SBC with their kit. its a decent looking kit. heres whats included:
356 T6 Cast Aluminum Heat Treated Bellhousing
Self Adjusting Hydraulic Release Bearing Assemble
Steel Block Plate
Pressure and Bleed Tubing
All Necessary Bolts


im suprised the company isnt on here. it seems like this kit would open up a lot more options for us old fashioned engine guys. if you would like the site jus pm me. heh, im excited now, no more lt1 t56 requirement.