The problem you might find with using rear 1/8 buggy shocks is that they are longer. They are quite a bit longer than t-maxx shocks and they will be somewhat longer than MGT shocks.
I had bought 8 OFNA 9.5 rear buggy shocks for my savage. With multi-position custom towers (or nova towers), you can get about the same ride hight/travel out of them. I'm not sure if you have as many options with the MGT as I did with the savage.
What I do know, is that buggy shocks are stiff. 8 of them non-modified on my savage were useless. With the size of the holes in the pistons, the thickness of the oil and the stiffness of the springs, they would barely compress off of jumps with a savage. If I dropped the savage from 5 feet onto concrete, the shocks would barely compress and the truck would bounce. I had to drill out the piston holes and drop to 30 weight oil. Even then, it was still stiff. I could probably drop to 20 weight oil.
I'm not saying don't try it. I'm just saying you more than likely won't be able to just slap on some buggy shocks and be off and running. The benefits of the buggy shocks, depending on what brand you buy, you can get a very well built shock that will last a long time between rebuilds and they are built tough as nails. The longevity and toughness out weighed the tuning problems I had. My savage can take 8-10 feet of air all day long without incident. Weekend after weekend...