'94 van engine swap

I have a '94 G20 van with a 305 in it. I've read that some G30's have a 454 installed. Is it possible to swap in a 454 into a G20 body? If so, what kind of transmission would it need? Is this a feasable project or am I just a little crazy?

g30 is the same frame, just mounts are in a different place and you would need to beef up the front suspesion, radiator, accessory routing, probably need a 4l80 trans.

My opinion is it would be to much work.