There are more attachments for the Bolens tube frames than you can shake a stick at.
For the ones you specified, you would first need a sleeve hitch. It's basically a 1-pt hitch and there are a lot of implements that used it.
The sleeve hitch for the tube frames would be the hardest piece to find, but they are out there.
There were a number of MFG. that made sleeve hitch implements, and they aren't all that hard to find.
Which implement you would want/need would depend a lot on the ground you are going to be working.
If it's virgin ground, then you would want to start with a moldboard plow. If it's an existing garden then you could get by with a cultivator or a rototiller.
As for buying a plow at TSC, I'd recommend against it. Used Brinly sleeve hitch plows are fairly easy to find at close a 1/3 of the price of a new one.
As for a sleeve hitch cultivator, the older ones are a lot more heavy duty than the new ones, and again, very cheap as compared to a new one.
No matter what you end up getting, I'd recommend using your H14 since it has the hydro lift. Some of those attachments can be pretty heavy (especially the rototiller) and can be a chore to raise/lower with the "Armstrong Lift" that is on the gear driven tube frames.
Ideally you would want a plow, a tiller or disk, and a cultivator.
Edited by OldBuzzard, July 09, 2014 - 10:29 AM.