I did a few upgrades to a 360 about s year ago.
This was a rebuilt motor with decent parts in it already, and I never pulled the pan off it.
The two complaints were...... it wasn’t as fast as they wanted, and the lifters were noisy.
Well.... 3. It didn’t want to go over 52-5300 rpm.
So I pulled the heads off, checked them over, flowed one, and touched up the valve job.
I checked the chamber volume, deck height, etc..... and calculated the cr.
I milled the heads some and ended up with 9.7:1(was like 9.2).
Took out the hyd cam, put in a solid.
Ran on dyno mainly to break in the cam and make sure the Ede 750 carb was working okay.
I tweaked the calibration slightly, but it was actually pretty close as it was.
They put it back in the car.
Fuel system is suspect(mechanical pump, factory lines and pick up), so they get a new hp pump and 3/8” line.
After a few teething pains are sorted out....... it’s about 1 second quicker than it was.
