Welcome George to FWW.
George is your headstock solid or does it have a morse taper such as MT #1 or MT #2, etc? I am assuming that by what you said it is not. If not you may have to see if you can find a 7/8 X 14 to a 1 X 8 adapter. Grizzly may have one. I think the outboard spindle is 3/4" X 16 tpi. I would almost bet that you have a #1 morse taper in the tailstock though. I am guessing that a adapter is going to be a hard puppy to find though. You may have all of this info already but just in case. Ebay may be another place to check and hopefully someone will have more info. I also noted that the lowest speed is 800 rpm which will be fine for spindle and pen turning but bowls that is way to fast especially if the piece is out of balance.
This kinda looks like your lathe and may help.
Also found this.
Hope this helps.
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