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I've got a dogs breakfast of a pan project and I just realized Ive got a problem with the compatibility of the oiling systems. Here's what I've got a 1951 Left case and a 1964 Right case with 1956 heads and aftermarket new jugs.

Having the '51 and '64 cases causes the flywheel assembly to even be custom built from one side to the other. This new problem has me a bit stumped.

I guess the easiest solution is to run outside oilers from a "Y" on the oil pump and then drill and tap the heads to accept lines. Does that seem like the easiest solution? Is there anything I'm missing? Will the oil returns work fine even though the path on the '51 case ends at the '64 case?
 

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I believe you have a feed to the heads already. Should be in between your tappet blox. There are numerous articles on putting outside oil lines on early heads. And yes it works fine. Running the oil through the cylinder was a stupid idea on H-D's part. If you will look inside the cylinders on the bottom left side there should be a hole that dumps right on the piston skirt, thats your drain. Just ignore the oil ditch in the left case. case
 

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As stated, the '64 right case will feed, IF you use a '63-'64 or a '65 cam cover with the banjo bolt.
Any Pan head can be drilled for oilers if needed...the passage is there, just hit it.
Put a late cylinder base gasket on and drain through the cylinders ala '53 up and help oil your piston skirts.
 

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The first (I think) tech tips and tricks had an article about it and Andy hansen at HES has done several. I've done all of mine like that and have nothing but praise for it. The hole that used to feed it needs to be plugged at the gasket surface. I tapped in right above the intake manifold and hit the bottom of the intake rocker. The oil will travel to the intakes then head back to the oem feed hole then to the exhaust rocker. On two of mine I put a line between both rocker blocks and eliminated the oem holes altogether.
 
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have you thought much about the shaft diameter, bearing roller differences between the 51 and 64 cases?
This would be somewhat of concern....

It would be a better deal IF the left case was a 64 and the right was 51

Going to have the 1" tapper sprocket shaft... would have been a beefier left side with the 64 cause for running the Timken bearing and larger shaft...

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Why not trade the outside oiler case for 62 and older?that would make everything simpler. You can use 53-57 right bearing race and just use the 41-54 flywheels. I all for custom but usaly it's easier to keep within the limits.
 
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