Carb Bolt Pattern-225 Vs 231

I suppose it could be. I have the ability to do that if it is an option and would work. I'm asking because I don't know. That path would allow the gases coming through the PCV to travel through newly tapped hole and fitting in the block off plate and back to the beginning of the intake runners just under the carb?

 

If that block off plate was for the EGR, then I can only assume it would work for the PCV. Ones running exhaust carbon through it and the other moisture and atomized oil. Seems like it should work.
That plug you were pointing out earlier, is that a 1/4 or 3/8 NPT thread? The only downfall I could see to running PCV to one intake runner is that cylinder will be the only one handling the vented crankcase byproducts. Probably wouldn’t ever notice it though. Possibly some plug fouling over the long run?
Personally, I’d tap that EGR block off with proper size for PCV line and run it.
plenty of engine crankcases are vented to atmosphere like your current setup. Sometimes it’s messy, sometimes it’s not, depending on engine, condition, etc. look at all the classics still out there with a drip tube hanging out the bottom.

 

The EGR plate wont work. Under the cover are two holes. One leads to the exhaust cross-over cast into your manifold. The other leads to a cavity under your carb. Look down through the carb holes. You probably see a hole or two. Neither EGR port leads to the crankcase.

Hold on: are you looking for a vacuum source for PCV, or a place to draw on the crankcase? For vacuum source the EGR plate will work so long as you tie into the vacuum side, not the exh side.

 

Yeah be sure it's the vacuum side or you'll be blowing exhaust in the crankcase!

 

The old Holley had a port on the bottom of it at the rear where the PCV went.....from the crankcase. See PCV valve in pictures. New carb has no such port.

I'm supposing that is where the unburnt gases went back into manifold to get burned. I think I understand this right. That's a vacuum port is it not?

 

The factory 225OF has an adapter plate between the 2J carb and intake where the PCV valve ties in. If I remember correctly, the air injection system(?) used on the “smog” 225OF also tied into it somehow.
Yeah, apparently under that block off plate there are two ports. one side is going to be manifold vacuum, the other ties into the exhaust ports. On my smogged 225OF with air injection/EGR (whatever that system tries to be), those ports in the head and intake manifold were completely sealed with carbon.

 

Port closest to carb.

 

Awesome Rich. Thank you. That's exactly what I was going to do to figure it out.

Got a little flustered with installing this carb tonight. Just can't do what I want with the fuel line. Partly because the inlet is on the passenger side of the carb which is opposite of where the fuel pump is of course. And the relatively huge HEI distributor is kinda of in the way. And the accelerator pump is right on the front of the carb, in the middle, to the driver's side of the fuel inlet which hosed me a little because I was going to screw a brass 90* into the crab and run the line across the front of the carb. Not sure a 90* fitting is a good idea or not anyway.

So, as much as I try to limit the use of rubber fuel line, I guess that's what I'll to do for now. Oh, and the steel line I got from NAPA pretty much collapsed when I tried to bend a 90 in it. I don't have the best bender but the tubing is way cheaper than the stuff I pit on the JEEP many years ago.

I might do a write up on this install when I'm done. I was hoping it would be a quick carb swap but, it's taking me longer than that. Working on it an hour here and an hour there makes it hard to make headway.

And just to be clear, the guy who sold me the carb has been decent so far. I believe my issues have been my fault. I'm a bit A.R. and I overthink everything and often make my own problems.