The filter before the pump has got to go.There is a sock (filter in the tank)that filters the fuel to the pump.Could be restricting fuel to the carb big time.
There is nothing wrong with an Edelbrock carb.For the street they can be tuned to run very well.They are also the easiest carbs to tune.If you cant tune your Ede,with the ease of them and parts available,you surely arent going to tune a thermoquad.
Any carb your working on,if you dont know how it works,and dont have it set-up right it will run crappy.
Get the manual for the carb,and learn how to set it up.
Usually these carbs run pretty dam well right out of the box.
Just wondering why you changed from the stock (yellow spring) ?
Did I mention get rid of the filter before the pump ?
