Using both senders is an interesting idea. I have always used the GM senders that the ECU read for engine/tranny function and then in a separate isolated harness use the Toyota senders in the GM block to run just the Toy gauges. The last project I mated everything into 1 harness but it was quite a bit more involved. Great work by the way. I have a new project that I am thinking about, just not sure when or how to do it yet.
Good to hear from you, Hope Co. is treating you well.
But the fuel lines are ready to come out the firewall is nearly clean, Fuel pressure regulator is ready to plumb, and the frame is almost done. One thing to do while the fender is off, Take care of the body sealer. Enjoy I will be posting again in a bit.