I have 2 GM parts books..both books show that 36(FC), 37/38(GB, HB) front leaf spring assemblies are the same....P/N 593688..BUT when I look up the individual leaf spring part numbers there is only ONE 1936 leaf spring that is common to the 37/38 leaf part numbers....is this a misprint that has been carried along in error? Should have 8 leaves and one top leaf that extends from the back to just past the middle (partial leaf to prevent unwinding during braking)...anyone have a book with different info....one book goes thru 39, the other thru 49..thx. Billu38