i want to change to lower gearing, i want to keep the orginal axles on my 63 k10 they are 3.54's dana 44, but i want 4.10 or 4.56, i want to know if i can just change the ring and pinion, if so some of the sets of ring and pinions you see on ebay like the 4.56 that say its for a dana 44 fit?

1949 Chevy 3600 Flatbed all orginal
1964 gmc 4000
1973 gmc 6000
2005 chevy duramax 4x4
1994 chevy 1500
Trucks are GM and Tractors are Orange

"I don't measure a man's success by how high he climbs but how high he bounces when he hits bottom." - General George S. Patton