340 6-pack ???

[69 modtop]

I have a 69 barrracuda mod top formula s with a 340 6-pack and a 4 speed.

my question is this. when i purchased the car it had and still has no vacuum pots on the outboard carbs and no progressive linkage. I am wondering if there is a mechanical progressive linkage available that will work or if i need to get the stock parts? any help is greatly appreciated.

 

[demon seed]

So, with no vacuum diaphragms and no linkage the front and rear carbs are just there for show? Curious.

Terry

 

[memike]

here is some holley's of a 70 barracuda you may have carter's

 

[69 modtop]

they are holleys and i can run a 2 bbl or all 3 carbs at once.

 

[demon seed]

If you're going to run the full mechanical linkage then you gotto to run the front and rear carbs on a progressive disc. In other words those two carbs don't start to open until the middle is at least 1/2 throttle otherwise the engine will bog down. When the front and rear carbs "start" to open will take some experimentation.

Terry

 

[69 modtop]

where can i find this linkage is the ?. i've looking for some time and come up with nothing so far. i have a set that is broken, made by edelbrock and no longer stocked, cause it's from the 70's.

 

[fastnos]

here's a couple of links you might want to look at.

http://www.mopar1.us/6barreltips.html

http://www.sixpackperformance.net/

http://promaxcarbs.bizland.com/sixpack.chtml

http://promaxcarbs.bizland.com/Home.chtml

These should get you started. Not sure about sixpack performance in N.Mexico, haven't dealt with them in a long time(8 years plus.) Pro max is the people I see people talking about now tho. Let's hear how it turns out. JOE

 

[69 modtop]

thanks for the help, promax has the parts and services that i am looking for.

 

[hemidreamer]

I to thank you for the information, will contact Promax. Trying to tune a 340 with a six-pack, all kinds of trouble with the end carbs, might be the linkage. Also just got the motor off the dyno and VERY disappointed, for a street motor with about 2600 stall converter, 10.5 compression, x-heads, looking for the right cam !!!! Any suggestions ??? Thanks.

 

[FASTBACK340]

Which side of the carbs are your fuel lines? If they're on the passenger side, it's a modified Mopar set-up. If it's on the drivers side, you probably have G.M. carbs, which didn't use the vacum diaphrams.

 

[fastnos]

Your welcome! :thumbup: Keep us posted after you get them setup. They're a blast once they're right. Just takes a little to get them there. I always started with the center carb. Disconnect linkage to outside carbs and block them closed! VERY important (don't ask) Adjust center carb for best perfomance. then hook up outside carbs. You might have to get a couple of different springs for for the vaccuum pods, but what ever you do for one, make sure you also do it to the other @ the same time. Only other big thing is playing with the power valve in them. Should scream after that!

 

[moparlee]

Some good info. I just posted some pictures of mine in the early A section.

Lee