I need advise on an 8 3/4 so I dont break it again

heavy car, lot's of power, manual transmission = time for a Dana 60 ???? Might be your cheapest route at the end of the day. Honestly, with that much power and a clutch car and that much weight, a Dana 60 is how you fix a 8.75.
That is why the factory installed 60's in the 6 pack and hemi b-body's.