With an SFI Turbo case and the bolt on bell for the SBM, you are good to go. No blankets, no shields. It's also a bunch lighter than a 727. The use of the 400 allows a MUCH better converter selection. The Mopar trans are too short from the block to front pump, which severely limits the core choices that FIT. The GM spacing allows nearly unlimited choices. I THINK a 400 fits with no floor pan mods on most cars, but I am not sure. Several on this site have Turbos, maybe they will answer that.