If you have a complete motor - all the "tin'{valve covers,oil pan ,timing chain cover } and the intake with the 351C it's a direct bolt into a Bronco. Same motor mounts,same flywheel,same starter same bell housing as the Windsors -how ever the water pump inlet is on the driver side and the passenger side exhaust manifold is tight to the frame.
A local generic engine builder quoted me a price $400 higher to rebuild the 351C vs the 351W
A local specialty builder quoted me substantially higher - but quality work - 400 hp with stock 2v heads and stock intake . If i wanted 600hp - that would entail other non stock {exspensive} parts .
Cleveland may not be for the average guy . It has few common parts with the Windsors and less support ; although the Aussies are the go to guys as they like em.
SHX