Gary, you won't have to make a special trip for threaded rod if you have a spare bolt collection like most of us. Find a 5/16-18 bolt with the appropriate length and cut the head off, then cut a slot into the end that fits your favorite screwdriver with a die grinder or dremel. You only need to screw it in finger tight but the slot makes it easier to remove. Here's a couple of 1/4-20 bolts I've used on Harleys. Bolts modified like these come in handy for lots of uses like oil pans, front timing covers, bellhousing to engine, etc. Hope this helps.

Mike

Modified Bolts.JPG