440 build for a tow rig/"muscle" truck?

Well I just got a new aluminum water pump, water pump housing and that long drill bit from 440Source but now I'm wondering... the stock iron pump housing that came with my core 440 has the inlet on the passenger side while this 440Source one is driver-side. My truck currently has a 26" aluminum radiator from ECP with the ports located for SB application with the inlet on the passenger side. If I reuse the old iron housing I'd be able to keep the current radiator right? I would prefer to lose the 15 lbs or so off the front end and also have the higher flow from the larger passages but nobody seems to have any pass-side Al housings in stock... and returning this 440Source housing and not needing to buy another radiator would save me about $350-400.

Thinking more about it I'd have to pay return shipping and a possible restocking fee, might just hang on to the 440Source housing if I decide to put this 440 in a car later on... it was only $100