You could wire the two yellows (they are 14 ohms) in parallel. Question is
would Tracy's injector driver transistors handle the extra current?

       Tracy says his driver can handle several saturated type injectors
in parallel, so it is not a problem. He also says that it is likely that I
will be able to run with just the yellow injectors. The red injectors are
quite small, and are used for fine mixture control at idle, according to Tracy.

       Bill Dube'

What is a problem is staging the injectors. If it were me I would
try four yellow, two on the first stage and all four on the second.

Paul Lamar