Re: McKay fuel injection
I run those sets and am not sure about them on the street unless it was a car driven to a specific event and then home, but certainly not as a daily driver.
They like to Idle at arould 1500 to 1800 and they make an incredible amount of low end torque.
They like at least 120 lbs. of fuel pressure and need both an electric "start up" pump, which is then replaced by the mechanical pump.
The manifolds rot at the water jackets and will almost certainly require attention. The manifold like you have there is a part of the system, as are the pumps, injectors, and linkage.
You will need something like a good set of Brodix heads at least.
Good luck. Stick them out of the hood of a Vega and have fun !