i didn't purchase them, they were on my bigbore viper when i bought it and i had to rejet because i'm putting pipes on it. The previous owner left the stock exhaust on it. They seem like they will work fine but i agree it's not really that much of a hassle to just take the carbs off and do it. Mopar, do you think you could help me with the clutch setup on my viper? It's a 780 Hauck engine with hauck pipes and a 136 in suspention with a 2 in track, the current primary has a Hauck over drive sheave, hauck x weights and the secondary has a green spring with a Hauck v helix, i don't know how well this would work but i also have 8bu-00 weights, a couple other helixes, a set of heavy hitter weights and few misc springs to work with if the current stuff doesn't work, if you could help me out at all that would be great thanks