#1 145
#2 150
#3 85
#4 80
#5 110
#6 80
#7 20
#8 150
I'm assuming #7 is a burned valve.
Without knowing any more, pull your heads and recondition. While you're at it, install a good roller chain.
I don't know how many miles are on this engine, but since you have the top half apart, this might be a good time to do the bottom (while you're at it).
Reconditioning the heads will restore compression. On very worn piston rings, that can be a cause of accelerated but inevitable death. It happened to me on a '59 Pontiac. That engine ran GREAT after doing the heads, and it started instantly, but not for long. The rings were over 100k old, and they soon started blowing-by from the new-found compression. I didn't do the bottom because I was a kid, and didn't have much money.
Lesson learned: Do it right, or leave it alone.