You were going slant six? The T5 with slant six should be a well balanced combo. Lots of room for mechanical clutch linkage too.
The guys running the HDK or RMS suspension get some of the benefits GM has. No T bars. But the torsion bars have pluses too. Room on the bottom side not is not one of them.
Always have trade offs. The less common Mopar platform in some ways has more complications to modify than GM.