I have a 1974 142e that has been garged since 1987, and I was wondering how to go about swapping from fuel injection over to carbs. I currently have early
k-jet injection (CIS) and was wondering what i have to do to make the conversion. any help would be greatly appreictiated. Thanks in advance
~Mark

Mark;
I don't know if this is relevant for you at all, but I uploaded Volvo's old tuning brochure here. You will find a few pages listing the parts they used for the various tuning stages, usually including twin Webers. Mostly Swedish text, contact me if you want any translation assistance.

Erling.
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My 240 Page

Is the K-Jet not working? There's blessed little that can go wrong... If you need relays I have spares.

Anyway:
Remove the K-jet Stuff.
You can either replace the fuel pump with one block mounted or re-use the old and get a heavy-duty firewall mounted Holly FPR like a friend of mine did.
Vented filler neck cap
Leave in or otherwise plug the block coolant temp sender and the sender in the downpipe.
Install carbs, route your PCV and hook the vapor expansion line to whatever your conscience dictates: open air or the carb airbox.
Pop 7/8" freeze plugs in the injector ports, or seal up some nickels.

Your linkage will need some finagling, as well as AT kickdown cable if so equipped. And you'll have to look at a wiring diagram to slim down your wiring harness some for the various fuel pump relays.

Do give K-Jet a second chance though. I find it very efficient in economy, simplicity, and it delivers decent power. Near-perfect plugs every time I pull them, 23mpg freeway.

-Sean
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1966 122s, 1970 142s, 1974 142e... Blue is Beautiful

The other benefit of K-jet over the older D-jet, is that there is no computer to deal with. Put in a bigger cam, and it simply sucks more air and fuel. Unlike the D-jet, which can't deal all that well with more than tweaking in the way of performance mods.
What carbs were you thinking of? If you're going with SU's, HIF's are more reliable than HS's. Also, you'll get more power out of dual HIF 6's than a single downdraft weber. I've never liked the single weber set up. Always seemed like a step in the wrong direction to me. Now, a pair of DCOE Webers... but then, to use a pair of those, you'd need to build the rest of the engine up to handle that much carburation.
Unless the K-jet suffered some catastrophic failure, I'd clean it up and use it. Working properly it's worlds better than carbs just in terms of reliability. One other thing that I've done to cap off the injector ports is to cut and drillaluminum plates, then put a rubber o ring underneath them and bolt them down to the top of the head. Worked pretty well. (not really my inovation, friend came up with it.)

-Nick