Upper Control Arm Mounts C10 vs C20

[D-n-Tyke]

Pretty simple question, tried searching with no luck, so apoligies upfront.

Are the upper control arm mounts on a C20 the same as those on a C10. I guess specifucally I am asking about the mounting studs that the crossshafts mount to. Are they the same size/dia/bolt size.
Looking to see if C10 upper arms will bolt directly up to a C20 chassis.

[SCOTI]

Originally Posted by D-n-Tyke

Pretty simple question, tried searching with no luck, so apoligies upfront.

Are the upper control arm mounts on a C20 the same as those on a C10. I guess specifucally I am asking about the mounting studs that the crossshafts mount to. Are they the same size/dia/bolt size.
Looking to see if C10 upper arms will bolt directly up to a C20 chassis.

I know the stud sizes are different between the 1/2 ton vs 3/4 or 1-ton 73-87/91 upper arms. Not sure on the pre-73's.