Don't be so intimidated.
Take your time, label things correctly so they don't get crossed. Mainly vacuum connections. Wouldn't hurt to do the electrical connections, but most snesor connectors only connect one way to a secific sensor.
When it comes down to removing parts from the motor, printer paper box tops are god. IE -cylinder heads, make a diagram of the head on the the box top and direction of the motor, always use forward as a point of ref. Then as you remove each bolt, take a screwdirver and pop a hole in the box top in relation to where it came off the head, same would apply to almost everything else, intake, water pump, oil pan, headers, etc.
Really, once all the wiring and hoses is out of the way, the actual rebuilding process of the motor is fairly easy believe it or not.
Although I understand your reasoning, I think back tracking to a TPI from the LT1 is not a good idea. I would be more concerned of engine management by the ECM more than a rebuild going that route.
