Carb swap, and all the adjustments with it.

The only differences in the BG carb is it was designed to generally run better leaner rather than richer. They are very good carbs. So good in fact, I dont like them. They are a pain to keep in tune if you live where days are 50° and nights are 30. The floats, Dave is right. Tehy should be center of the glass, but there is a little lee-way, and if it is splashign around or stalling due to excess fuel on stopping, you can lower the floats a little. There are lines cast in the bowl next to the sight plug. Go one line lower than dead center, see if that cures it. Now, being that Holleys and BGs are basically the same, the same settings need to be addressed if it's not what your engine likes. So basic tuning comes in to play. First, you have to get your timing set. If your distributor is indeed stock, including the vaccum pod and advance weight springs, you have some improving you can do. For now, a stock distributor will not let you run more than about 12° initial without giving you fits at higher rpms. So with the vaccum hose disconnected at the pod and plugged, set your initial timing at 10 or so, and clamp the dist down. Then move to the carb. First, set float level. Get yourself a vaccum gage and plug it on the port below the float bowl. That's manifold vacum. Then, fire the engine and set the idle speed to 700 by your timing light or tach. Now you can set the idle mix be the fastest rpm and highest vaccum reading (should happen simultaneously) you get by turning the screws in very small amounts in or out as required. Then while keeping the vaccum gage in view, hold the brakes, and drop it in gear. Get the reading off the vaccum gage. If it's below 8" in gear at hot idle, then you will want to pull the front bowl and verify the power valve is correct. If not, replace it with the right one, and start with the idle speed and mix adjustment again. When that's set, you can start with the drving and jetting part, and the secondary spring and squitor routine.

It might be easier to rebuild the Edelbrock ;)