You can change camshafts , you cannot take a camshaft cap / bearing from one cylinder head and bolt in to a different cylinder head.Ive moved my Camshaft and vacuum pump issue to a new thread
https://www.fiatforum.com/stilo/454001-1-9-jtd-still-vacuum-pump-casing-end-camshaft-broken.html
Oil burning has stopped so turbo replacement 98% certain was the fix thanks all