I would go with the smaller pump. I know you would have to use a regulator with the big pump and may even have to with the smaller one. I would call Edlebrock first and ask what the max. fuel preasure they recomend with your carb is. I use an Edlebrock mechanical fuel pump and it works great.
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73 coupe, 351W, GT-40 heads, edlebrock 750, offenhauser intake, .488 lift cam, 2.5 exhaust, 2 chamber flowmasters, blah, blah, blah...
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