Both sets of those heads had 84.0 CC so no other changes on that swap, it had 9.25 to 1 compression ratio
The next change I did was to swap the crankshaft from the 4.250 stroke to 4.300 stroke to raise the pistons up so I got 10.3 to 1 compression the next winter Every time I swapped parts on that motor the car got quicker and faster, lots of fun