Fresh 360 Valve Train Noise.....

At the age these “parts” we are using are getting, (40-50 year old heads and blocks, etc) in my humble opinion, it is imperative to check valve train geometry and lifter preload. The lifter preload is set by the pushrod length.

.030 to .050 off the heads plus .010-.030 off the deck over the years can drastically change pushrod length needs.

We need more information.

How long did it run fine?

How long after first start did it start making this noise?

Was cam lube and assembly lube still inside the engine on first start?

Have you changed the break in oil yet?

Hopefully it’s nothing major and you can get back to enjoying your car. Eric