1969 Barracuda Carb Suggestion Needed
Which 750 would you recommend? I don't know much about carbs and even when I search just Holley 750 double pumper a huge list of them show up.
this style....
[FOR SALE] - 750 Holley
Let me explain a couple of things, means you say you have really no knowledge on cars.
1). Picture yourself on a 10 speed bike. Your 4.10's are like having the 10 speed in 3rd gear. In other words, to travel with other bikers on a bike path, your legs are going to be rotating really fast, while their in 6th gear and barely moving their legs compared to you. Now, if you all stopped and lined up to race, your 3rd gear will help you beat them on the start, but if racing a longer distance, they'd soon be around you.
So, you have to decide what your purpose for the car is going to be. If it's going to be mostly drag racing (1/4 mile), you'll like the gears. If your going to do a lot of daily driving (some on the highway), you might want to go to 3.55's behind that 4-speed. 2.76 gears would be like 9th gear on the 10 speed bike; 4.88 gears would be like 1st gear.
2). Your intake (M1 single plane) is designed for rpm's above 3500 rpm's. a Dual Plane intake will give more low end torque, more mpg. Most dual plane intakes will make more power than your single plane under 4000 rpm's, and make a better city driver. A lot of test have been done on small blocks, and there is very little gain at high rpm's on a single plane vs. dual plane, even at 6000 rpm's.
3). If I was you, I'd purpose the car. If it's a ground and pound, slam'n gear car, leave the gears and intake. If your going to do a lot of cruising with it, I'd go to 3.55's behind the 4 speed and go to a dual plane intake. This will up the mpg, allow more comfortable 60 mph cruises, and with a 360 still pound (may actually take more advantage of the torque). If you go to 3.55's, and a spread bore dual plane intake (even a factory cast), then that TQ would be hard for me to give up......
I personally had a dart once with a 360 in it. I went from 4.30's to 3.91's, and the E.T. stayed exactly the same.
