How to determing between Valve knock or Rod knock?

I’ve got an almost completely rebuilt 2002 Ford Focus 2.0L Split Port Engine and its got a knock. I’m having a hard time figuring out if its valve knock or rod knock.

To add some background, I had the valve seat in #4 drop when the engine was at idle. The work I’ve done to it is as follows:

1. Block machined and #4 sleeved to standard (Completed by an engine machine shop)
2. 1 new connecting rod
3. 4 new pistons, wrist pins and rings (Wrist pins pressed in by engine machine shop)
4. New rod and main bearings
5. Complete new timing kit (tensioner, water pump and belt)
6. New cylinder head with original valves lapped to the new head
7. New lifters
8. Complete new upper and lower seals and gaskets
9. New spark plugs and ignition wires

The only original parts left in the engine are: 3 out of 4 connecting rods, crankshaft, camshaft, valves, rockers, valve springs, oil pump, timing gears, and all the sensors.

Also there is no codes related to the issue so its mostly likely a mechanical issue.