No oil to left side of engine

After having my 1969 odd fire v6 rebuilt, I found that it is not getting any oil to the lifters on the leftside of the engine. The rightside gets plenty of oil (removed spark plugs and intake and turned engine over with starter for 1 to 2 minutes several times).
I think there must be something blocking the flow. I need to know the path the oil takes from the rightside to the leftside so I can find and solve this problem.
I have good oil pressure-when hot 20psi@ idle and 55psi@ 60mph.
I tried blowing compressed air from one side to the other (Intake, rockers, pushrods,and lifters removed) no air will came out the other side.

 

Sounds like there's a problem with debris in oil passages. Check out a copy of V6 performance for a detailed breakdown including pics of the oiling system.

I can probably help with some scans but it won't be until later tonight.

 

When it was rebuilt, was there any silicone sealer (RTV) used? That stuff is notorious for blocking oil passages.

 

Don't start this motor again until this is fixed the mains are fed thru this gallery and are being starved at this point. There is a crossover and plug at the rear of the block just below the camshaft center line.

 

I couldn't find a v6 performance book, but found 2 drawings of the lubrication system, not detailed well. I have a general idea now of the direction the oil flows. The two main oil galleries are connected at the front of the block, either over or through the front cam journal. The front cam journal has a groove in it and the bearing has 2 holes, could this be the connecting point for the 2 galleries or is the connection casted into the block near this?

 

Like the man said:

 

Are you sure the oil is just not making it thru the rocker arm shaft? I was just working on cleaning mine for a rebuild, and they were blocked. All of this solid gray sludge just kept coming out of the passages.

Josh

 

I can get compressed air from the rocker area to the left main gallery but not between the right and left galleries.

 

If I snake it as you say will I need to remove the oil pump and go in that way?

 

I would appreciate any scans of pictures that can show me the root the oil takes to go from the oilpump to the left LIFTER gallery. I would like to find the most likely place were it could be pluged up, before I start disassembling.

 

I pulled the motor and took it back to the meachine shop, they took it apart and found that the comp cam they put in had no groove in the front at the bearing area. Without this groove oil has no way of getting to the left side of the block. Comp cam said they should have noticed this at the time of the rebuild. Any way it now has a groove and is getting oil everywere it should with 50 psi, bench tested at the shop. I will be picking it up sometime this week and hope the be jeepin' soon.