Slash 4x4 with 1520 1Y?!?!

[Losi LST2]

K guys so i'm thinking about doing this....i've been waiting for 3 months for a motor for my slash 4x4 and i really want to run the thing before the snow gets here....so i was woundering...what if i took my Castle 1520 1Y, my MMM and my turnigy 6s 30c 5000mah lipos and shoved them all in the slash geared for about 60mph? (21/54 gearing)

Do you guys think it's possible?..i know the motor will fit with a very slight chassis mod. but the real concern i have is what will it do to the truck?...the slash 4x4 has the revo/e-revo diffs so they should hold right?..anything else i should be concerned about before i do this...i have FLM CVD's so twisting axles shouldn't be a problem..

What do you guys think?

-Austin