Blackberry,
Sew-Classic sells left parking strait stitch feet for high shank machines. Yours looks to be a high shank but I can't be positive from the pics. They also sell seam guides that screw to the bed so you don't have to stick tape on the machine.
The smaller the stitch length, the less you can push in the reverse lever. However pull the top and get some Tri-Flow down inside the reverse mechanism and everything else that moves. That should do the trick.
That's a nice looking machine.
Joe