Drawbar bracket bolts

[L.C.Gray]

On the bottom of the differential housing of my '63 Ford 2000, there are 4 bolts installed vertically from the bottom up that attach the drawbar bracket. Does anyone know if those bolt holes are through or blind?

I've reworked an old drawbar I had laying around to replace the one missing from this machine and my thought is to remove the bracket and install the drawbar and pin it to where the pin is captive between the bracket and differential housing.

If those are through holes, I'd be leaking out fluid while mounting the drawbar making a mess and I'd rather avoid that.
 

[old]

From the factory they are blind so if you remove them no oil should run out unless of course some one has messed up and drilled them out or some such thing
 

[showcrop]

I had the bracket off my 1961 901 and nothing came out. But why would you do it that way? why not use the original pin and keeper clip?
 

[cdmn]

Very common to put in a too-long screw and torque it up until it raises a divot inside the housing. A wad of grease above the screw could do the same thing. Had a drawbar slip out of my 3000 just a few weeks ago. Luckily, I wasn't towing something on a hill. Don't know when or where the pin fell out. Seems that they aren't that secure. At our showgrounds we use a 3 cyl Ford for mowing, and it lost it's pin once.