My 318 w/850 Thermoquad never idles well in gear, and stumbles off the line

Personally I would disable the secondaries to get the primary side tuned then go from there.

BUT, I havent had a chance to mess with a TQ either. I want to give advice, but I dont have enough knowledge to give it regarding a TQ.

I can tell you that there is alot more to it than just messing with idle jets and screw setting. If you couldn't get it to idle at all then that would be your source, but what your saying is it is bogging off the line, correct?