Did you get a new engine just because it was throwing oil out of the oil filler hole while the engine was running? If you are going to test compression on an engine, that is not how you do it. Compression is tested one cylinder at a time by removing the spark plug and hooking up the compression tester gauge and crank the engine. This step should be repeated for each cylinder. As for the fact that the engine blew some oil through the filler hole when running is not uncommon, although it should not be blowing oil out of there, in which case something would be very wrong.
I can't help you much with your question about the cams, but I believe most companies engrave their name or logo somewhere on the cam axle. Try rotating it and look for the engravings, they should be at one of the ends.
2003 Mustang GT
Intake & Exhaust: K&N FIPK CAI, Mac O/R H-Pipe, Custom Catback w/ Magnaflow Magnapack Mufflers.
Suspension: H&R Super Sport Springs, KONI STR.T Shocks & Struts, J&M Caster Camber Plates, Steeda Bumpsteer Kit, UPR Elite LCA's & UCA's.
Performance: BAMA 93R Custom Tune, FRPP 4.10 Gears w/ Terminator spec T-Lok.
Planned Mods: FLSFC, Eibach Sway Bars, Throttle Body, Plenum, Rims.