So to clear things up, which one did we finally decide on? Seems like the Napa is a no go cause it leaks somewhat and is tight. The 471763 seems to be working for now and Eric recommended 470160. So which one will work better?
National #471763
National #470160
NAPA CR11800
Petersen's 4wheel and off-road used Napa PN 11343 when they did the ultimate danger ranger.
http://www.4wheeloffroad.com/projectbuild/131_0712_1997_ford_ranger_drivetrain/index.html
If that even helps at all.
I searched on napaonline.com, both #470160 & #471763 interchange to Napa PN 11343. I think I'll give that one a try