Russ just because your front cam bearing does not have a 360 deg groove in it that does'nt mean its the wrong bearing. The factory bearings are not grooved as evidenced by the first pic here. This old engine was never rebuilt and all original when I tore it down. Since you do have a oil hole in the 6 o'clock position then you should be getting oil to that bearing. Oil is fed to that bearing from the front crank bearing. The only way you could not have oil flow to the front cam bearing is the feed passage in the block from the front crank bearing going to the front cam bearing is plugged up with something. There is one more very possable thing that could cut off that oil flow and thats the front crank bearings are put in wrong. The 2nd pic here shows rod and crank bearings, the crank bearings are on the bottom row in this picture. Notice one half is solid(lower or cap shell) and the other half is grooved with a oblong hole or slot in the groove(upper or block shell). The grooved half with the hole is suppossed to go into the block, that slot or hole lines up with the feed hole for the cam bearing. You can see that "IF" they put the solid half into the block instead of the grooved one that will cut off the oil supply to the front cam bearing.
I realize that an engine thats set for 3 weeks or so most of the oil is going to run back down into the sump, so its hard for me to tell over the internet if the bearing and chain were getting oil or not. Can you get me a pic of that front cam bearing, maybe I can see some tell tail signs if you get a good close shot of it, particuliarly the bottom half of it at the 6 o"clock posistion.
I'm including a 3rd pic that shows the front cam journal itself to show how the front of the thrust plate and the timing chain get oil. Notice the hole in the cam journal, that hole takes oil under pressure from that bearing and it travels through the snout of the cam to that second hole you see. That 2nd hole is posistioned so that it lines up with a groove in the back of the cam sprocket. Oil sprays out of that groove hitting the back of the cam sprocket and splashing all over the front of the block where the thrust plate is. Oil also flows past that 2nd hole to the very end of the cam itself, right on out the bolt hole. Take a look at the washer under the bolt that holds the cam sprocket on, notice it has grooves in it that run from the bolt hole outward. Those grooves should be facing the sycro gear. Oil under pressure srays out of those grooves and splash's all over the syncro gear and the timing chain and sprocket. Think of those 2 oiling points as rotating high pressure spray heads.
There should be alot of oil spraying around in the chain area between the block face and the timing cover.
Post some pics of the front cam journal and that bearing and hopefully I can give you a better idea what went wrong.
OK Russ theres only the 1st and 3rd picture gonna post here because the bearing picture is in another post. Hopefully this link will take you to the thread with those crank bearing pictures.
http://www.sccoa.com/forums/attachment.php?attachmentid=11007