That cam would be a bit big for a bone stock low stall converter, IMHO. If you can find a high stall converter meant for a 340 or Hemi, then fine. Get the cranking compression(or dynamic compression) back up to the high end for the heads and fuel and cam you will run, or go with a cam that only has four or five more degrees duration than stock. what you want is to not lose low speed working compression due to the intake valve closing a lot later with a moderately big cam like the Edelbrock you are looking at. If you use that cam with a stock 2200 rpm converter, it will be in the bottom half of the gear a LONG time, making the car slow out of the gate by a bunch. If you want to use the low stall converter, take a look at the ones CAB recommended, the 268H or 270 H for total duration Vs the stock cam. There is a web site called BIGBOYZ (its a Harley motorcycle head porters page) that has a dynamic compression calculator under one of the listings, to help you figure this all out.
Getting that compression up there will be worth about 30 ft lbs of torque on the bottom end, by the way. Getting it right will pay dividends if fuel mileage as well.