use the 20R head and intake on the 22R(81-84) block. nothing from the 87 22RE can be used unless you need the crankshaft
some EARLY 20R's had smaller combustion chambers but those usually did not have mounts for pwr steering
Use the 79 20R you have.
sell that pacesetter on ebay, its worthless unless its a rare long tube (Ive never seen a long tube Pacesetter)
use the 22R carb on the 20R intake.
if you cant afford a good header run a 22R exhaust with the long twin tubes down to the cat then a 2 1/4 inch tube to the rear
