Quick carb hook up question

[saxart]

I'm in the process of converting my truck from a 2bbl carb to a 4bbl carb as part of a crate engine swap. The question mark comes when hooking up the carb linkage. Got a rebuilt Quadrajet from National Carb, and an original cast iron intake from a local engine rebuilder.

The question is, how is the original throttle linkage hooked up, and where does the throttle return spring attach? The engine has a thermostat housing with a spring hook on it at the front of the engine, but it seems the spring should attach and pull to the rear of the engine.

Here's what things look like right now.



Any thoughts are appreciated.