I bought a new 670 Street avenger for my truck's 360. I didn't like it at all - I had a real tough time tuning it in. It also idled like crap. I replaced it with a rebuilt and tweaked '73 thermoquad - the engine now purrs like a kitten and screams at WOT. I also have a 750 Edelbrock performer carb on my Charger's 440 - no major complaints with that.