Reply to "Recommendations on intake manifold for A3 heads and shop that can bung it for EFI"

The Scott Cook dual plane manifold will mate with an A3 head.

However, if it were me, I'd choose the CNC Trick Flow heads and their long runner fuel injection intake. The Trick Flow heads have a better combustion chamber than the SVO heads, and great low lift flow due to that combustion chamber. The CNC ported versions flow well up to 0.600" lift. Since FI is your goal, the Trick Flow long runner FI intake is far better at doing that job than a single plane carburetor manifold (longer, equal length runners).

There will also be off-the-shelf headers available for the Trick Flow heads in your Cougar's engine compartment. No such thing for the A3 style exhaust ports.