73-91 suburban drop spindles

I have a couple of questions about these. Are they the same as the 73-87 c10 drop spindles? I've noticed they are offered at 2", 2 1/2", and 3" drop. Are all of these accurate? I've never heard of 3" drop spindles. I've also noticed that some are for 1" rotors and some are for 1.25" rotors. How do i measure my rotors? Do i just measure how wide they are? Help would be much appreciated, thanks.

Yes the part #'s are the same for the c-10 and subs. The 73-87 have two part #'s. Bell tech 3 inch drop spindles from 73-91 are all #3100. But some 73-87 came with a 1" rotor and that part # is 3200 also Bell tech. Ground force makes the 2.5" drop for the 1.25" rotors...If you need a price hit me up...

DJM makes them for both size rotors, too. DS-2045H for 1.25" wide rotors, and DS-2045L for the lighter duty 1" rotor width. To see which ones you have, measure the width of the rotor- it won't be exact unless your rotors are new, but you should be able to tell the difference.
Good luck!

-Phil at FBI

thanks for the info, guys.

hey the burban looks killer im doing an 87 at moment. you got any pics of the inside mainly the rear behind the seats? if so can you mail them to lonebker@aol.com thanks burban really does look good. take care.