My R code Mustang's lengths are probably different, so can't help you there, but are they planning on bending some metal tubing for the cooler ends? I ask because, coming off the cooler, it's a fairly tight turn to get through the radiator core support, and normal hose could get cut easily there, as well as the stress that would be placed on the fittings from the tight bend. A good hose company should be able to make up some tubing with bends to work in that spot.