1970 C-10 Handling issues.

[Qwertyuiopi]

I would like to request some assistance.

I’m having issues with horrible stability, handling. When I drive down the road it feels like the truck is “ wondering” all over the road.

I bought a 1970 C-10 and have used parts from a 1972 c-10 to convert it from drum brakes to disk brakes. Took it in for an alignment, alignment guy says spindles are not compatible and that’s why I don’t have any stability going down the road. Is this true ? I thought they would work, specially since I installed new ball joints, tie rods(inner & outer).

Any suggestions ?
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