[Yukon Jack]

My 70 K5 apparently had the Dana 20 mated to a SM465 and originally a 350. When I bought the K5 the Dana 20 was gone but the floor shifter ring is different than what I see on the NP205 equiped trucks and K5's so I'm pretty sure it did come with a Dana 20 originally. Plus when I installed an NP205, I had to make some spacers to drop the transfer case crossmember to allow the NP205 to fit properly.