Nope. Just get a timing gear and chain. Install, and you're good to go.
Been there, done that.
Neil
Neil,
When I got my GNS it had a wrecking yard 302 in it. It also came with the original VIN "J" code 302. It had an original timing chain and gear in it which was worn beyond belief and it had jumped teeth. 15 of the 16 push rods were bent and the number two block bullhead that supports cam bearing and number two main was cracked from top to bottom.
This is David Athans type of damage done by a young guy with his foot to the floor when the chain let loose on a basic stock motor. Like you I have replaced many a 60's era timing chain and gear set and all was good.
I would recommend the installation of the new timing chain and gears. If the old upper timing gear is the "plastic" coated aluminum variety, I would drop the pan to remove any debris. The old gears of this type broke up a lot of little pieces that can work their way into the oil pump. And then jam it and break the oil pump rod.
With the front off the motor it is the easy time to drop pan and install a one piece pan gasket. And a new oil pump and heavy duty pump rod. Cheap stuff to ensure a long mile motor lives.
And after that I would recommend a compression check to see if any valves got tapped. More than likely not, but an easy check before you seal her up.
Rob