Advice on mounting 2BBL on 4BBL manifold

[TexasJ10]

I want to mount a 2BBL FI throttle body onto the Edelbrock Performer 4 BBL intake manifold. I need to make an adapter to do this. The Performer is a dual plane manifold and I'm wondering whether it makes a difference how far forward or back over the 4 BBl opening I could go and not effect performance. I'm not even sure it would effect performance. I know nothing about the concepts behind a dual plane manifold, but it looks like the air fuel mixture passes through two different distcit levels inside the manifold. Any thoughts would be appreciated.

[Ralph]

Your manifold will be fine. Your type of fuel injection is essentially an electronic carburetor. Holley makes an adaptor to fit a Holley or GM throttle body onto a square bolt manifold.