Like Frank says, that really doesn’t look that bad. Remember, these are not race engines, and will tolerate imperfections and still run just fine. Is it perfect, no, but it will probably work fine. Clean up the lower crank journal and check it with a micrometer. Was the lower seal in good condition when you removed it? Check the upper bearing also, water in this area is pumped back up to the upper bearing, so those tend to get rusted.

If it’s still apart, measure the upper bearing surface on the crankshaft with calipers or a micrometer, just to be sure. I just had a ’55 15 that had zero rust in that area but the journal was .002″ worn and the bearing it rode in was worse. There was so much slop in the upper bearing that it was throwing the points out of whack and the engine wouldn’t run right, because of that. I’m ashamed to say that I put mine all together, thinking the bearing was fine, just because there was none of the usual rust. After figuring out the problem the hard way, I had to take it all apart, again. Yours is probably fine; but I am just trying to save you that potential grief.

olcah wrote:

Fleetwin,
The lower seal was intact when I replaced it. There was a small amount of rust on the crankshaft lower seal area. The upper bearing showed no rust. I replaced the upper crank seal and the bearing o-ring.
Thank you.

Be careful, many of the powerheads of that era did not use an oring on the upper bearing, adding one will mess up the recirc system. You mentioned there was some rust on the bottom of the crank, was it rusty where the lower seal rides? Did this powerhead look like it had been apart before?