Either carb will work fine. But the flow is better in a Demon and they use better parts. The Demons are also a great looking carb which has always been a killer with me on the Holleys. Holleys are a great carb, and they are cheaper. They also have a larger base of parts, but lots of parts from Holley and Demon interchange. I'm saying either a Holley or Demon 650 Double Pumper.
As for what DSS says. First off, they are engine builders not racers so they arent the best people to talk to about that choice. They are also a race engine oriented company so when they see someone ordering a Super Pro Bullet they are expecting your going to race the crap out of it. So what they advice may not translate to well if your more of a street guy. Not that a 750 wouldnt run but your engine may not have the pull power to correctly generate the right amount of vacuum to operate the carb right. You can easily generate a "lazy engine" by over carbing. If your building a street car with a mild displacement, and mediocre compression then a 750 is a step in the wrong direction. For your 5.0 the real power band of a 750 probably wont start till 3500-4000 and thats also the same start point for your Vic Jr intake. Which may be fine if your planning on pulling 7500-8000 rpms. But if your using it to drive around, you wont be please with the hesitation, slow power build up and lost low end torque. The cfm rating doesnt mean anything about rich/lean. Its the same as talking about runner size, its saying how much air it can move. If its too big its like sucking through 5 or 6 straws. See how great your lungs enjoy that.
What are the pros and cons of each in your guys opinion. Oh please help me decide.
