My $.02 on the sprockets, I got the ALH style adjustable sprocket to fit perfect by machining a AAZ IP bracket to for the nose of the LR pump & by removing the LR bushing & using the ALH shaft bushing.
Look at the water pump. BDV's is either an 1Z or AHU with LR pump.
All sitting on an engine stand mocking me..........
Its about as franken motor as you can get i think...