Good luck with the swap. I am doing the same with an S10 Chassis and Silverado Drive Train. Here is a link to my build. I am using the prototype for the most recent version of the AD kit.
http://67-72chevytrucks.com/vboard/showthread.php?t=609082&highlight=s10+frame+swapThere is a LOT of useful info on the 67-72 Chevy Truck site. I would be in trouble without it.
By the way, make sure you keep all of the Control Modules and harnesses that go with the motor and tranny. I'm not at the point of hooking them up but I know you will have headaches without the original electronics.
Please post pictures when you can.