Good luck with the swap.I ended up goin thru hell with Tremec,but the trans is now running beautiful.After sending back the first one...anyways
You can use stock driveshaft,but havto change the yoke to match the 31 splines on tail of tranny.Clutch if I remember right is 26spline(I went with a spec stage 1 to break it in) Just get a FR flywheel just make sure its balanced to 50oz.The shifter should come with trans and don't change it till your warrante is over.As for your bellhousing I would go Lakewood if i redid my swap its much stronger and it won't amputate ur legs if the flywheel decides to com loose.I wen't with a FR bellhousing.Adjustable X member,and your still gana be messing with it.I don't know how you can reuse your original one unless you can break the welds holding it in place.Once you ge the x-member in tackweld it like the stock one is you'll see what i mean just so its not adjustable anymore.I also think when you pull your spedo gear it will be all F'd up so you might wana look into that.A bunch of GM Syncromesh (chevy dealer only) you'll need 4 quorts(only good thing chevy ever did haha)to bad its about $12.00 a quort.
I know I left out things,but I am a tranny pullin master can do that sh izit in minutes HAHA