250r or 400ex Shock for the Blaster?

[tyephoon]

Hey guys! i was wondering, i have my blaster setup with a stock back shock. I heard that a 250r and 400ex shock will mount but i've never seen it done and only heard about it. How much modification does it take? what do you have to do to make it fit? i wanted a little info before i went and bought one off ebay. or if any body has a red one to part with pm me. thx tyler.