I had my engine built about 3-4 years ago and had purchased a parts car to rebuild that engine so that I could still drive the car in the meantime. I knew that the car had some upgrades done but never really new the extent of them. I recently contacted them about making some additional upgrades such as turbo and cams based on advice received from members here. When I had mentioned upgrading the cams to the shop and they all were pretty sure that I already had the stage 2 bc cams, but if I do it would be from the original owner of the engine.
I feel like I might already know the answer to this question but is there a way to tell other than removing the valve covers and looking?
Such as me posting audio of the car at idle?