We'll just agree,... to disagree.
I haven't looked,... but I'll be you an
ice cold beverage of your choice,... that the 88-98 C2500 drop spindles are
at least $100 higher than a 67-87 2wd drop spindle.
(Summit had CPP 1/2-ton drop spindles for $209 a while back).
Plus I think the geometry of the 88-98 spindle
has to be different, and an issue when using them with 67-87 a-arms.
I'm one to
always rebuild the front suspension components when I install drop spindles on the 40+ year old trucks.
So a lowering job up front is never cheap for me.
Like SCOTI said,... the '87 trucks are now 24 years old.
So all "cheap swaps" really need to have the components swapped out for new.
(and how many 88-98 trucks have less than 150k miles on them?)