CRF450 engine in 400ex frame

[400Trooper]

Hello,
I'm sure this is probably an old subject but I would rather ask then assume anything.
I have a 2002 400ex basically stock with some mods but I have the option of getting a CRF450 engine. I have thought about going to a 426 but the cost would be roughly the same.

My questions are:
#1. Who has done this modification?
#2. Are there motor mounts already manufactured for this?
#3. All details would be greatly appreciated.

Thanks
400TROOPER

[mic 902]

A few people have done it. Check out the Hybrid Section on here.