Ray_66v,
Not sure how much backhoe experience you have? I have a ten ft Long brand 3 point backhoe also with fabricated frame mount adapter on my IHC 484. Frequently remove front bucket in tight spaces, there are no issues with front end lifting in the air. I dont push snow with it anymore using 6 ft bucket because it is a 2WD tractor. Even W/O the bucket, the FEL is adequate balance. If hoe attactment is within 3 point rating, tractor should be in balance with FEL attached. Also had a dedicated TLB with FEL, IHC 2400B 2WD and it was a. beast in snow but a very heavy machine. So feel free to relax. The Long hoe was private label, made by koyker in the Dakotas. Long tractors were manufactured in eastern Europe.
Not sure how much subcompact backhoe experience you have. But, they are very light tractors. And, when you hang hundreds of pounds on one end, it takes all the weight off the other.