size bolts on control arm

I've managed to take the bolts off and get the control arm out, but I have two different size bolts on it.

Can someone tell me what the proper size flange bolt is for this truck.

99 Ram 1500 four wheel drive uppper control arm.

Obviously I am going to have to search out a repair manual on this truck, because someone in its past has used what was on hand rather than what is correct.

Might not be of any help but the control arms on the Dakota use a 1/2" diameter bolt on the lowers. The upper arm is held in with the cross arm bolted to the frame using a factory made bolt assembly that floats in the mount allowing it to be loosened to adjust caster/camber