The auto trans oil cooler was in the bottom of the radiator. If yours is an original manual trans radiator, it won't have one, but all replacements do.
The manual pedal is the same, except not as wide.
You'll need the kickdown parts, including the pedal with arm, shifter, shift rod, and neutral safety switch and wiring.
Save all the part you remove. If you sell the car, or change your mind someday, you'll need all that stuff.