I have everything for the 4.7 swap but the countershaft. If anyone has the part number for this, please let me know. Once I get that I should be able to track down that one single part.

 

Get the entire FD. Not good to use a ring gear and countershaft that are not an original set.

 

after a few days of serching i finally found this:

Part numbers for or everything that comes with the JDM ITR Final Drive kit (courtesy of hondaswap.com):
41233-P80-E30 : 4.785 DIFERENTIAL RING GEAR
23421-P80-E30 : COUNTERSHAFT FIRST GEAR
91107-P80-E30 : FIRST GEAR NEEDLE BEARING (x2)
23914-P80-E30 : COLLAR RING
23221-P80-E30 : 4.785 COUNTERSHAFT

There is no reason I shouln't use the parts i have....they are all brand new Honda parts. Honda does not match the shaft to a specific final drive gear.

 

If its brand new then you'll be fine.