Kyle, the measurements may be the same, but if you check the part numbers, everything is different. The block, the crank, the rods and pistons, and cylinder heads are all different from a N/A 3.8 to the SC motor. For example, if you look at the main caps on a regular 3.8 block, they're just normal size like a typical North American V-type engine. But on the SC motor, they're BLOODY HUGE to support the pounding of the boost and the SC belt pulling on the front of the crank.
A decent used SC motor can be had for a reasonable price, so what you're proposing to do doesn't really make sense in that respect.
cheers
Ed Nicholson
SCCoO