What wire gauges should I use?

[1986.5supra_kid]

Installing a 400lph walbro in a ma70 and how should i hook it up? what amp relay and what guage wires( type)?

also installing a map sensor and a Iat on the IC pipe after the intercooler, what gauge wires(type) should be used there and where can i get these wires from?

Im so close now to finishing my supra