Orlando,
Check me on my thinking here but we have Power = Volts X Amps:
You said you have a “potential” in you system of 150ADC x 13VDC = 1,900Watts (Power).
Now, the Power Pole switch is rated at 45ADC at 58VDC = 2,610Watts (Power), well within your possible current limits.
I...
Won't lap in...
I think I have bad valves on the 3FE head, replaced all twelve with Toyota valves. Only 21 valves in the USA for the 3FE, not as expensive as gold, but close. Now to swap heads and wiring.
And Rocky, I like that tire carrier, what did you use to make it, tube or...
Orlando, look at these: Powerpole Power Distribution: DC power distribution is easy with our Powerpole power splitters in 4-way or 8-way configurations. West Mountain Radio RIGrunners enable fused DC power distribution.
On the right side of the page, second and third item
Jerry D.