Where to find throttle body sizes?

[AdmiralSenn]

Hi. I'm looking to eventually modify my intake manifold on my car by relocating the throttle bodies to a more optimal location. I'm converting from Bosch K-Jetronic and although the existing system will work to run the car (though mine is still a week or two from running as of this post), I'd like to eventually remove the now-unnecessary extra plumbing.

The car uses twin 40mm throttles stock. They're cast into a single unit, though, so I can't just relocate them without introducing a bunch more turns into the system, thus recreating the problem I have now - the excess plumbing makes routine maintenance like distributor cap changes a real chore.

Is there some place I can go to match up throttle size to vehicle application? I can find lots of performance, custom-built bodies (which I may have to resort to), but I'd like to see if I can find something locally that I can just clean up and mount, without having to pay huge amounts of money for something that's way too over-engineered for what I need. Basically just looking for a way to hunt down throttle body sizes on stock cars and motorcycles. I know that some car or bike used a single blade 40 or 42mm throttle stock that I can nab from a junkyard...

Thanks!

[devastator]

Are you trying to consolidate to a single TB or replace your dual with another dual?

[AdmiralSenn]

I'm trying to replace a dual throttle body with two individual throttle bodies - each bank of cylinders has a set of runners and a plenum, and the current manifold has a "W" pipe to bring the plenums together to the existing throttles. I want to remove the W and just run a throttle on the plenum directly - the only reason for the W setup was for some air/fuel metering equipment that is not part of the car any more. The plenums are far enough apart that a paired unit isn't an option. Removing the W and associated hardware would make working on the car MUCH easier - currently a cap/rotor change can take an hour or more to get everything removed and reinstalled. With the old hardware out of the way it's a two minute job.

I did some poking around, though, and found the Extrudabody site linked from DIYAutoTune - somehow I missed the entire front page... Looks like the Extrudabodies will do what I need pretty nicely - $100-$150 for a single 40mm body, so ~$300 total (plus random stuff I will forget to buy the first time), and I can have them welded them up to the existing flanges without having to adapt anything.

Unless someone has something cheaper, I think that's the route I'll be going.