Hey guys need some help! Does anyone know of or how to tune a Holley Truck Avenger. Its a 770 cfm on a 454 bbc I am willing to take it to a shop if you know of one or pay you personally (cash or beer) if you can help me get this thing running right or closer to right.

454 bbc
comp cams mild off road cam
holley blue electric fuel pump

Problem: It falls on its face when you stomp on it but runs fine with a smooth acceleration or stable throttle.

Can't offer much help other than to say I tried Carbco on the southside and all I got back was cleaned and painted carb. Didn't run any better than when I took it there $200 earlier.

good to know, thanks!

sound like you need to change the accelator pump.

come on someone in the gateway to the west must know of a good go-to carb guy or shop to help me out? I know of some performance shops but they are so full of themselves and the ricers that come out of their shop I dont want them to screw up good old american muscle.:D

Try Bier Brothers High Performance in Ofallon, MO. Right by Rothman Furniture.

Try asking on Midwestjeepthing.com. Someone on there will know of a place or someone that can help.