hey
welcome to the forum
well i can't say i've ever heard of a 1jzgtefc i don't believe that exists
but if you have the money for the jza70 1jzgte for engine, parts, time, frustration and pure enjoyment once it's completed
get the 1jzgte engine, harness, ecu and get ready for alot of research, time & money and you will have an awesome supra when ur finished