buying a truck from a non truck person

[55Willy]

found a 76 k20, is it a 44 or a 10 bolt and would it have flat tops?

4" lift 350-350-203 37's with 4.10's

 

[resurrected_jimmy]

flat tops on Dana 44 only. I think the cut off for flat top D44's was '75

 

[bigblazer87]

It should be a D44 with flat top knuckles, but depending on the history of the truck a different year front axle could have found it's way in there.

 

[atho]

I forget the rule of thumb for D44 vs. 10 bolt placement, but I have seen several 1980 1/2 and 3/4 tons with D44's up front. GM would use whatever they had on hand. Only SUREFIRE way is to go look.

 

[gmc4cw]

I have seen flat tops on 10 bolts. A friend of mine had them on a 1987 10 bolt. He bought the truck in stock trim so I doubt someone swapped them. Go look under the truck

 

[79k20350]

I have seen flat tops on 10 bolts. A friend of mine had them on a 1987 10 bolt. He bought the truck in stock trim so I doubt someone swapped them. Go look under the truck

Id be willing to bet someone broke a knuckle or you didnt know what you were looking at. No stock 10 bolts came with flat tops

 

[thatK30guy]

'76 will have the flat tops. This year is the "first design" axle. The "second design" started in mid-'70.

10 bolts are "second design" also. You won't see them in '76 unless it was swapped in.

Another 'plus' is the D44 in the K20's have 1/2" thick tubes pressed into the pumpkin and outer C's.

 

[55Willy]

so it'll be worth the $1000 to go check it out.

 

[bigblazer87]

If it's in good running condition, most definitely!