I've been looking at the cylinder select for the '7727 Memcal. What I've been able to find out, is the cylinder select voltage is about 5 volts for TBI any number of cylinders. Similar to how the '7727 cylinder select is set to ZERO volts to convert a '7727 V6 memcal to V8 memcal.

I've also researched wiring schematics for the Quad 4 using ECM 1228708 which uses 4 port PnH mode injectors. I suppose the 1228708 would be an optional ECM to use for under hood V8 TBI?

I think I'll need to do some bench testing to figure things out.
dave w