hello
im from israel and im building a buggy which driven by 3.8l 6cyl gm motor supercharged
and i have a 4t60e transmission which i want to work with
the engine is managed by haltec ecu
since i dont have any original buick wiring harness and i dont mind even to shift manually im asking if someone can help me on what wires if any or vacum i need to connect to the transmission and how (in details please)
sorry for my english if i did any mistake

hope u can help me

eli