[AnthonyG]

The choice between 2X2 or 4 Brl is all about cool. The 2x2 set up is the best lookng short of 3 or 4 carbs, however the performance is all about the CFM's delivered. I believe Holley makes the smallest 4 barrel which is in the high 300 CFM range which is about all you stock flatty will handle without too much fuel delivery causing many issues. As was said and I believe you need to do the milling of the heads at the least before entertaining the 2nd Holley 94 or a 4 brl., You really need a cam to open the lifters more to let in more air to accommodate the extra fuel. That being said velocity is another way to go. Some type of high rise setup like a slingshot intake will also increase HP and torque. Something to think about is too much fuel without enough air can wash some the oil from your cylinder walls and shorten the usable life of your engine. If your not going to do the things required to handle the extra fuel as scooder said just mill the heads and leave the single deuce on the car. if you can find a couple inch to say 4" spacer to raise the single deuce higher this will help pep it up also.