Maserati 250F engine strapped to a wooden pallet / trolley. The engine is a metal casting from the Italian company Revival Miniatures (to which I have added some extra detail and plumbing).  The trolley is a scratch plastic job, and the mechanic is the (pushing) Lorenzo Bandini figure from Hiroboy.  I’ve added the beginings of mechanics overalls to him (with milliput), so further refinement is required.