I know SD makes a base for $400, but that takes the "budget" aspect out of my TBI to MPFI project. I'd planned on using my existing Vortec carb intake with TBI adapter and fashioning my own rail brackets, but I find myself lusting after the long runners of the TPI for towing, etc.

Has anyone dabbled in making an OEM TPI base fit Vortec heads? I know the runners and bolt holes would need a little work. But is it even possible?