904 will bolt up to a 5.2 Mag just fine (if you are converting the Mag to carb'd instead of OE injection). If you want to keep the Mag injected, You'll need to notch the 904 bell housing to allow fitment (of a crank position sensor???).
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
