there are 2 types of sierra box, the type 9 and the mt75. The mt75 is stronger but you'll need a different prop and mounts etc. The type 9 was fitted to some capris so is a straight swop. 132bhp will be fine with a type 9. It should bolt straight up as the bellhousing pattern should be the same, but you will probably need the clutch from a cvh sierra.