Working on a project and need to know throttle shaft to throttle shaft distance on a big block 6bbl setup. Center carb to rear carb.

I just snapped this. Hope it works for you. I did my best to keep the end-clip in the center of the throttle shaft hole. It looks damm close to 4 3/4" .

Just measure the carb to manifold bolt hole centerlines.

Don't have a manifold yet.

Thanks, that's a huge help! Man that's tight in there, really wish I could save the 350 carb I have and gain a little extra room.

My comment was referring to using the carb bolt pattern, not an approximate length from shaft to shaft - for anyone replying to you.

Update

It appears you have 3 center carbs there. That's not going to work well, but you can always swap the float bowls to the side-hung style to allow for more room between carbs. I have two pristine sets of the DC carbs for sale if anyone is interested.

Those carbs look like my early mechanical set to me
I need to put another low deck 400 block stroker motor and car to have some more fun with those street and strip racers that don't believe six packs will make power

Yes, 3 4412 carbs. IMHO side hung just don't look right. And yes probably a tuning nightmare but not much worse than the typical double pumper carbs.

I like the look of the traditional float bowls too. After several decades of car shows etc, I realized virtually no one ever attempted to look under my Shaker hood to see the beautiful sixpack any way, so now I'm abandoning the sixpack and running a single 4150 throttle body and multi-port EFI. EFI is soooo much nice from a drivability and engine life standpoint, and you can't see the set-up with a Shaker air cleaner anyway.

With the wide-band gauges available, tuning has become much easier.

The problem is you can't have both a metering block and a center hung bowl on the rear carb. One or the other fits. Not Both

Um, look at the picture, those carbs are bolted together and bolted to the manifold.

There's a fair amount of mill work done there.

Not in that pic

Look again, I just put a couple bolts in for pictures. But there's 2 bolts holding each carb down.

The goal was to fit the carbs without adaptors or modifying the intake. Got really close, just need to clearance the plenum openings for the throttle blades.

I still need to plug unused vacuum passages in the throttle plates and figure out a PCV port.

Then lines (easy)and linkage (still debating). I'll fab a air cleaner baseplate and buy a stock style lid and element.

Stock lid relies on studs mounted to the carbs , so make sure you take that into account .

It's been a long time since I've had a 6pk but why does it look like that rear carb is not mounted squarely , does a bolt actually go thru that hole or did you oval the holes to get it to bolt on which is why you need to clearance the manifold for the throttle blade clearance ?

Yes, slight slotting of the holes, and therefore a clearance problem with the blades. But, all 3 carbs will get 4 bolts for attaching

I'll make studs to fit the lid.

And before anyone nit picks, yes the carbs are partially assembled. You don't have to point out the missing throttle shaft, pump assembly or the choke blades in the wrong locations.

Gaskets ?

I'll cut airhorn gaskets. Base gaskets should be ok other than the mounting holes and or throttle holes. Other gaskets should be standard stuff.

What GoMango said he has 3 carbs with metering blocks and center hung bowls. It will not fit! Thats why the DC carbs used the side hung bowls. They are smaller and you can fit a metering block with them.