paid about $450 after tax for a new, not rebuilt Edelbrock performer carbureator in november of 2002... seemed to work better than the crap I had on the 350 that used to be on the suburban. so, when I installed the 454 in my K20, imagine my utter surprise, and shocking anger at the fact my truck magicaly developed a vapor lockiung problem. so, after banging my head against everyting in sight, replaced all the filters, ran compressed air through the fuel lines, and etc, I swapped the old nasty carb back onto the suburban that was originaly on the 454. what I've noticed in the 5 minute test drive: -I can't get it to die on WOT like I could with the other carb -engine runs 25 degrees cooler -doesnt start to fade out at a stop light like the other one. -idle wanders slightly, but it did before. -rough transition when the secondaries open, but as before, it was like that previously. I can only surmise that the $400 carb has something seriously wrong with it that's running the engine lean, and allowing the truck to vaporlock, and that I'm really pissed off now.