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holley 780 on a 440 h.p. engine idles great, runs fine at cruise but has a horrible bog/flat spot just off idle. i have tried adjusting the idle mixture, advancing/retarding the timing and opening the secondaries a tad bit. nothing helps. this is on a new rebuild kit. any ideas?

from everything ive read i would have to agree. you would be better off with vacuum outboards on the street.

the outer carbs already have mixture screws. they may be covered by a lead plug. heres another article on 6 packs. http://www.mopar1.us/6barreltips.html

they seem kinda high priced. for a 66 cuda, $219 cr-11a http://www.quantaproducts.com/prodinfo.asp?number=CR-11A where here http://cgi.ebay.com/ebaymotors/NEW-gas-fuel-tank-barracuda-cuda-1964-65-66-67-68-1969_W0QQcmdZViewItemQQcategoryZ10076QQihZ003QQitemZ130189106862QQrdZ1QQsspagenameZWDVW...

id go with a holley because of the simplicity, availability of parts and theyve been around forever.

never heard of it. do you have a link?

my 66 has a nipple up near the gas cap that the hose hooks to. it is to let the the air out of the tank when it being filled. look in side the filler or maybe up under the fender where it fastens to the body. its not big. only 1/4" or so

only thing that beats a 6 barrel is a big block 6 barrel. someone correct me if im wrong, but a 6 pack was dodge and 6 barrel was plymouth

ive been looking at those also. only diff i can think of is resistance in the windings affecting the fuel gage. or different voltage. didnt 67 & later use a voltage reducer?

i agree. earlier cars didnt have that garbage.

heres a cool site http://www.holley.com/applications/CarburetorSelector/CarbSelection.asp

ill probably hear a bunch of crap for this but... id rinse the inside with a little gas, drain it out then do it a couple more times. also outside away from anything that might blow you up. maybe kerosene or something that wont hurt the fuel system or motor if you dont get it all out.

most of the time on a mopar, the ground strap from the fueltank sending unit to the fuel line isnt working, or is missing. tray a jumperwire from a CLEAN BARE METAL spot on the frame to a clean bare spot on the fuel line at the tank. the gage should work. if not, unhook the sending unit wire at...

also put a little ky jelly on the o ring before tightening the retainer. helps to keep the o ring from twisting

thanks for the link, i hadnt seen that one. heres another one http://www.mopar1.us/6barreltips.html

flyboy, how did you get your camera in the tank?

id be more worried about the heat off that header tube. looks close

maybe this is a stupid Q, but have you tried different springs in the secondary vacuum thingee? (brain fart)

that is cool. 1 more Q, where is the stat? above or below the spacer?

old kimmer, this is not aimed a you personally or you alone so dont take it that way please. uuhh,,,,,, i just bought a roll of 3/16 brake line. steel plated copper. can post pics if nessesary. rated to 3000psi. whats up with that? could be that the copper makes it easy to double flare? could...

it was FREE. thats the only reason. we throw away partial rolls everyday. it comes in 50' rolls and usually use 25-35' out of that. thet rest gets dumped.

the reason being its a PITA to change! i yanked the in tank filter and put one right above the rear axle next to the frame.

okay, im throwing in my 2cents worth. i install heating and a/c systems for a living. the newer systems use 410a freon which runds about 300-400psi when the system is running. the refer lines are soft copper. the equipment also shakes-vibrates a bit while running. ive seen very few that leak...

a plugged fuel filter will cause poor higher speed driving. not enough fuel.maybe you got something in a passage somewhere.i wouldnt mess with the timing yet.

should be just one wire from the sending unit to the gauge. try grounding that wire and the gauge should read full. dont ground it for more than a few seconds or you will burn up the gage. check to make sure the ground strap fron the sending unit to the frame is good or the gage wont work. hope...

a backfire will blow the powervalve most of the time. it ruptures the rubber diapragm and allows fuel to pour in right out of the bowl. my experiance has been that the motor wont idle because its flooding but will keep running if you open up the throttle to let more air in. i havent seen the pv...