I purchased one of these for a front weight bracket but there isn't much of substance to mount to there.  Maybe a better design would be one on each side of the tractor.  I'm thinking of a rail along the side (more substantial than the cultivator bracket) extending just behind the mid cultivator mounting bolts (perhaps attaching there by flaring it inward, initially, probably just a standoff mount).  This would allow me to mount the weight brackets in multiple places along the side of the tractor.  Closer to the front for counterbalance, closer to the back for traction.  I like these, they seem very flexible.  Easily adaptable to a 3-point as well (although they sell those also).

Of course, but that's inflexible (not to mention near unobtainium), only a single fixed weight value.  With suitcase weights I can add whatever I like.  Also, it is a fixed position along the side.  

Or use Massey suitcase weights either to the front,middle, to the back balanced side to side. The lawn tractor weights are 42#. The engine side weights are 90# each. And the Massey suitcase weights are about 80# each .

The mid-mount bracket works well for stepping on and off of the CA tractor.

The weights are secure ease on and off !

Job well done!!

  The lowest price I see those brackets listed is $141 each. Then about the best price you get on the 41 pound weights is $62 each if you're willing to get 48 of them at once, otherwise they are in the $80 something range unless you want to pay extra for freight.  

  However as I see you want to ruin your CA with a 3pt there's no talking sense to some people. Why not just get a Ford or Ferguson that has a 3pt that works properly instead of a cobbled mess that will never work properly with the CAs hydraulics. As I said before if you want the low budget route, just build a seat for your MIL out in front of the radiator for her to get on and off when you need weight. As the 3pt will have the implements further out behind the rear wheels than any implement that Allis Chalmers ever designed, You'll need a LOT of weight out front.

I'm not modifying the tractor itself (or minimally so, 1 or 2 holes in the drawbar, bent the rear platform lip from 60 to 90 degrees, relocate a hydraulic line).  It will be fairly easy to revert back to OEM pin hitch/implements.  I don't see creating a tiny number of add-ons as a big deal.  The steel for one of the rails will run maybe $60...And I consider the $150 for the heavy hitch to be a bargain.  I checked online for nearly 2 years to find a pair of side weights that were not overpriced or in timbuktu.  I was warned against dealing with a few online scammer resellers that had some so that was the nail in the coffin for my search.  I'd still like to have some but I'm not actively looking at the moment.

My design will work fine.  It's not like I'm going to go hog wild and put a 1000lb implement on it.  It's going to be a (occasionally) working tractor, not a show tractor, not a "pulling" tractor.  I can easily make it more useful, so why shouldn't I.  I'm working on this and only this tractor for sentimental reasons.  I want it to be functional again, and useful.  In practical terms, that means it has to have a 3pt.  I hate 3pt designs.  But it is necessary.