If Turkey were to proceed with a conventional armed intervention - a 1 on 1 with Syria with full commitment of military forces by both states, who would win ?

No US-NATO support of any kind for the Turks; and Russia and China stay out of it completely (other than making noises about "aggressive war", etc.).

Regards

Mike

PS: This headline from TZ, ‘Turkey seeks parliamentary authorization to avert Syrian threat’ (7 Mar 2012), is seriously misleading because Davutoğlu speaks throughout in the conditional.