Thinking of getting an aluminium bellhousing made to replace the std cast iron one in an old Falcon of mine. Will be to fit a 4.1 and TR3550 Tremec. Concentric hydraulic will be used so mechanical actuation not important. Anyone had any recent experiences of their product quality and service? Good, bad, or ok? Also, Castlemaine Rod Shop any good after Rod Hadfield sold it a few years back? Seems to be my only 2 choices unfortunately....unless someone can suggest otherwise?????