I agree with Josh. Initial timing is very important in a street car with a larger than stock cam and an auto.
You wrote that you have 11 degrees initial timing, now once you know what your in gear (foot on brake, engine at running temp) vacuum reading is, you have a base line.
Then I would suggest bumping the initial timing up to 15-18 degrees (since you have a larger than stock cam) and retune your in-gear vacuum to the highest number at the same rpm as you had with the 11 degrees. If your vacuum reading went up, then the motor wanted it. Then you would want to recurve your distributor for your total timing and then test drive the car. If you gained in gear vacuum, then you will gain bottom end response too if the carb is tuned correctly. That 800 Edy should be fine for your setup. Get the timing correct first and then finish tuning the carb.