Magic - that looks like the fella below! Do they need to have hose clamps around them? Also, can anyone advise on whether it is worth the additional expenditure on ACDelco kit?
CHEVROLET 1991 P30 7.4L V8 Fuel/Air Pre-Heater Hose
ACDelco Professional Pre Heat Hose is an ideal high quality aftermarket replacement component for one or more of the following vehicle systems: ignition, and/or engine fuel management. This premium aftermarket hose is manufactured to meet or exceed your expectations for fit, form, and function.