The 69520 header is designed to fit 1982-97 2 wheel drive S-10, S-15, and Jimmy truck with a small block Chevy engine conversion. The 969-9926 motor mount kit allows use of original 2.8L mounting pads for a simple, bolt-in SB-Chevy installation with shorty headers. 969-4689 mount plates require the use of Chevy mounting pads (#22188497) and shells (#10213125) to install SB-Chevy (must use TH350 trans with 168-tooth flywheel) with full-length headers. They are for floor shift automatics; they do not work with standard transmission.