They make bolt in kits but since you are BOP it makes sense to piece everything together.
My recommendations:
Find an OEM BOP bell for $100, steel is cool and all but you aren't running 11's or faster where you risk amputation if the flywheel blows up and the buicks don't rev so low risk
Find a Buick stick flywheel, probably the hardest part
Buy a clutch from Fabbot (he makes the AR5 to LS adapters locally to me), he has a private line of clutches that are sourced from the same place Monster gets their stuff at a much less markup, I think he offers a 10 spline replacement
Go with a hydraulic TOB from Howe or similar to remove the need or wore out linkages
Chevy TREMEC TKX Driveline Kit, Clutch/Flywheel/Bellhousing
With the introduction of the TREMEC TKX transmission the 5-speed manual transmission has never been easier to fit in your muscle car or hot rod. At Speedway Motors we want to help your installation so we put together the complete driveline package. The driveline package includes the TKX 5-Speed...
www.speedwaymotors.com
My recommendations:
Find an OEM BOP bell for $100, steel is cool and all but you aren't running 11's or faster where you risk amputation if the flywheel blows up and the buicks don't rev so low risk
Find a Buick stick flywheel, probably the hardest part
Buy a clutch from Fabbot (he makes the AR5 to LS adapters locally to me), he has a private line of clutches that are sourced from the same place Monster gets their stuff at a much less markup, I think he offers a 10 spline replacement
Go with a hydraulic TOB from Howe or similar to remove the need or wore out linkages