Mike
Good choice on the straight haft. You should try an octagonal handle. It's a lot of work but it gives you a feeling of accomplishment when you're done. That thing is going to be awesome for splitting or chopping. Don't forget to weigh it before you rehang it.
A spoke shave or draw knife helps with the octagonal handle, but you can do it all with a rasp and sandpaper. I usually look for slightly fat commercial handles and then convert them to octagonal. They feel really good in the hand, and I think they help with accuracy too. They're easier than you think, just takes time.
You have a really nice axe head. Nobody has used the eye ridges for a long time. It won't be a moneymaker without the roll stamp but people like us will appreciate it. I would re-profile the bit a little to make it look like the classic jersey pattern shown on the back cover of " An Ax to Grind".
When you start sharpening, let us know how it takes a file.
Later