1985 Dodge D150 Carburetor Power

I have a 1985 Dodge Ram D150. It has a 318. Right now, it has a 2 barrel carburetor. I was going to put a factory 4 barrel intake manifold on it and an edelbrock 600 cfm 4 barrel carburetor on it. How much more power will this give the truck? Also, it’s a 3 speed. When you get on it, it won’t down shift to 2nd gear unless you’re going like 35 mph. Then it will stay in second until like 58 mph. Will the Carburetor help that at all? Thanks

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  1. Dodge Man