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Trans in its final resting place.....
If that was mine, If I am seeing everything correctly, I'd add 2 mirror image gussets as space allows for expected exhaust pipe clearances, on either side of those slightly off vertical flat bar pieces connecting to the rectangular horizontal tubes. The current connection is a stress concentration point, and likely to have little rigidity because at that connection point the cross sectional area is suddenly greatly reduced. How much loading on this member is unknown, but the weakness remains. 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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