Hi, I am trying to help my father-in Law fix his '51 CA. First order is to get some manuals, do you know of a good source? The major problem is that oil is just leaking good out of the front of the motor when it is running. I am assuming a front seal without doing any major inspection. Does this job require tearing out the radiator to make room for a puller? Just want a good look at the job before I leap into it. Thanks, Doug

Probly is from the front seal but clean it up good and look to see where the fresh oil starts dripping. If it is covered with old oil and dirt as most leaky ones are, it could even be comming from the governor and run down the front. As far as what comes off to remove the crankshaft pully, it will be all of the front end.
I have changed crankshaft pullys by jacking up and placing blocking under the pan. Removing the hood, radiator cover (grill), radiator hose clamps at the radiator, the stearing drag link, the four nuts that hold the front stearing to the engine, and using an engine crane chained so the complete unit will stay upright, slide it away from the engine. This leaves the fan and crankshaft pully exposed.

After you have the crankshaft pully removed, you can use a small dint puller to remove the seal. I have a sleeve made from a pipe nipple the diameter of the outside of the seal that is longer than the crankshaft end that I use to replace the sleeve.