Had bought a Holley Truck Avenger 770 carb new several years ago for my 428 and have not have good luck with the overall performance. Anybody else using one? Any issues?

66 Fairlane GT Silver Blue "BRUTE" Genesis 496/C4
66 Fairlane GT Nightmist Blue 428/TKO600
66 F250 Camper Special Rangoon Red 428/4-speed
2000 Lincoln LS Sport 5-speed

I have a truck avenger 670 on my Jeep with a 360. It does great off road, especially in off-camber driving. Sucks on the road though. No low end, slow throttle response, and it took a lot of swapping jets to tune the secondaries to where I was happy with them.

I never liked it for street, and if the Jeep were driven on the street more than offroad, I would pick something else.

m

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1967 FE 390GT engine: 416 CID 233/238* @ 0.050 Solid Lifter w/ 4 spd TL.
1968 GT/CS Mustang. 289/c4
1995 Mercedes e320 I6 DOHC, 216 HP wagon.
2003 Tundra SR5, 4.7 DOHC, 4x4.
Another Galaxie (one day.)

Oh and a Bicycle - daily driver to save gas for the 'F'un 'E'xcursions.

.......surfaces on the main body are flat/true, as well as throttle plate and metering block/plate surfaces. This should be the first step for any new/used Holleys you plan to use, Rod.

Mickey Thompson's 63 1/2 #997 S/S Hi-Rise 427 Lgt/Wgt Galaxie,
1957 C-600 Cab-over carhauler w/390-4V, 2-speed rear-end
FGCofA member #4908
MCGC member #75

"There will ALWAYS be an FE in my LiFE"

i have a holley 570 street avenger i use on my 302 for offroad, has jet extentions and a rubber fuel hose with small holes drilled in it connecting the two vent tubes and the holes in the hose point down. the thing works great i couldn't be more happy with it! maybe you need to try something like that

If it's not doing well on the street, you need to tune it a bit. I bet it's the off idle and transition that's giving you the problems. Try adjusting the idle screws a bit and see if it's any different. On the primary side, you can change jets to see how it acts off idle. Also, try adjusting the accel circuit with the cams and nozzles. Also, the power valve number can be increased a bit, to help richen it up when the main circuit starts working. For instance, if you're lean at tip in, you can go from a 6.5 power valve to an 8.5 and it may give a little shot until the mains catch up. Anyway, not trying to write a book here, but you can tune that thing for great performance.

Chuck J.
64 Galaxie 390
68 Fairlane 289