This is my first time running a tunnel ram on my sbf I have a few ?'s will the stock fuel pump work with a tunnel ram with 2- 450 hollies or will I have to go with a elec. pump . And is the vac. line on a 450 hollie carb ported, I am not sure were to hook up my vac lines from the disp. & auto trans, do I hook both carbs vac lines together or the front for the disp. & the back carb for the auto trans. I got a pair of carbs from e-bay & to my surprize it fired right up after I put them on it seems to be running just fine with out any playing with them.
It depends on its intended use. On the carbs if the vacuum port is in the metering block it is ported if in the base plate its manifold vacuum.
At a cruise the pump will probably be fine. Wide open throttle may be another story. Not sure what the gallons per hour the factory pump is capable of but if the car gets 10 mpg at WOT at 60 mph it would require 6 gph..... I am sure it will drink more than that. You can get mechanical fuel pumps that will pump anywhere from 25 gph up to 120 gph (Carter makes that one). I would put that one on it and you should be fine!
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