I need to know if there is an adapter for the intake manifold to the MSD throttle body.

I have a 1963 Pontiac GP which still has the original intake and AFB Carb. I assumed that

the throttle body would fit, so I ordered the atomic efi system. Lo and behold it doesn't. My mistake. Pontiac intakes up to 1964 are not interchangeable with later models. If there isn't an adapter I will have to return it. any advise?