Vintage Dirt Bike Q & A

Hello

I'm new here, and have a question for ya. (Besides the ones in my sig...) I have a 80 CR250R with a bad engine, and a 81 CR450 with a good engine and trashed body. I was wondering what is involved with swapping the 450R into the 250 Chassis? I have access to any tooling that I might need, and I think that it would be a really cool project. I know that something like this has been done with the 480 engine, and I'm hoping that someone here could point me in the right direction. Thanks for any info or tips on this conversion,

Andrew

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04 XR650
99 KX500
98 KTM300MXC
91 CR500
90 CR500
87 KX250
84 CR500 (LOVE THIS ONE!)
83 CR480
82 CR480
82 Maico 490 Alpha 1
81 CR450
80 CR250

4 Honda 350X's