Alabama Slamma

So out of the HE351Ce or the hx35, whats going to be the best for me as far as housing size, possible pressure, and fitting if/when I swap...Or can my HY35(or a be sufficient enough to take the rig up to I guess the mid 400's hp and basically a medium duty towing with some street performance type truck? Or maybe even go aftermarket?

I guess I never really thought about it, I believe I read it was an hy35 and then in 2003 when the switch up to the CR stock was the hx35...I know I've heard alot of good things about em and I was wonderin what would be a good/my best option for upgrading my turbo...Can the hx be a direct swap?