Without ferm. temp. control, you might not like the results of your bock. Maybe another dark beer?
You COULD easily convert this to a dunkelweizen:
Replace half of the light DME for wheat DME
Use Wyeast 3068
If you're a fan of Dubbel:
Replace 1 lb of the light DME for 1 lb sugar. Cane is fine, but I like muscavado. Honey is nice too, just add ~1.5 lbs.
Add 0.2 lb Special B to the steeping grain bill
Use your favorite belgian yeast strain