I have seen gearboxes advertised as Pontiac but are identical to mid to late twenties Chev gearboxes. Ford T crown wheel and pinion fits some 490 diffs. A 1922 Oldsmobile cylinder head will bolt straight onto a Chev four block and Model T wood wheel spokes from Snyders fit chev fellows. The 1925 Chev speedo shows up in a Buick or some such monstrosity. So what other cross over parts are there? Oh yea... I think Delage and Chev use the same wheel bearing grease.