which carb to use on 6cyl

[davidh]

for a 250 stocker. whats the best carb? stocker? In 1968 they changed carbs. should I use this later one? and then there is the weber2bbl carb people have used as well. I got a truck that will need a carb so Im checking out the options. I will likely change to HEI as well but other than this it will be stock. Let me know good and bad . Thanks

[vin63]

I ran a 4 barrel, vacuum secondary, electric choke Holley 390 cfm carburator on an Offy 4 bbl intake on my 194ci L6. I routinely got 18 mpg with a lot more power available if I got into the secondaries - it would be even more responsive on a 250ci L6. I'm not sure if this is something that even factors into your selection, but I found the 4 bbl carb was a lot more efficient than the single and 2 bbl carbs that I had tried before. If you're interested my combo is for sale.

[ol Curt]

It depends on what you want. I have tried a Holley 390, rebuilt Rochester 1bbl and now have a Holley / Weber 2bbl. If you go with a two or four that are progressive, i.e. the secondary(ies) don't open till you get into it, the performance is good and so is drivability. The Holley 4bbl and H/W 2bbl offer electric choke, which is good.

You could find unlimited discussions of options on www.stovebolt.com or www.inliners.org

Bob

[ol Curt]

I had some requests to see the Holly/Weber, so her are some pics. I modified(cut to fit) the bottom of an old factory style air cleaner to fit the odd shape of the H/W and added some foam to seal it. There are some old style air cleaners that bolt right up, but i was trying to keep the factory look.

[Dadsredwagon]

great pics... what did you do about the linkaage fpr the gas pedal? and is that a space used as well on the intake? do you have any part numer or where di you buy trying to get my set up fixed still have the factory one barrel but the linkage is way worn out..

thx

[slepysal]

thanks Bob very interesting ,looks very doable

[Oregoon]

Great photos of your engine Curt! I dig the color--my 292 has remnants of it!

[ol Curt]

I ended up using the original linkage. I think I had to turn the carb to make that happen. They can be had for pretty cheap from Tom Langdon at http://www.stoveboltengineco.com/aca...asp?catcode=33

Tom was an engineer at GM and played a part in developing the 250. Whether you're trying to hot rod a 250 or just make it driveable he can help. I would just call him. I think I needed a 1-2bbl adapter and the carb.Tom has a linkage, but I didn't particularly like the appearance of it.

[LILRED66]

Bob:

Thanks for sharing information about Tom from GM. It sounds like he is a great source of information. I will ear-mark the site to my favorites list.

Happy Holidays!

[ol Curt]

No problem Tony. You might recognize the air cleaner I used. ..it was from you. I didn't want to cut my original up.

Bob

[tommyd241]

Originally Posted by ol Curt

I had some requests to see the Holly/Weber, so her are some pics. I modified(cut to fit) the bottom of an old factory style air cleaner to fit the odd shape of the H/W and added some foam to seal it. There are some old style air cleaners that bolt right up, but i was trying to keep the factory look.

So, is there a little performance gain using this carb? Also, are you running an electric choke? If so, how do you hook that up?

[ol Curt]

I will have to look later to be sure, but i thinkit is just one hot wire(ignition on) to the choke.