I have seen a picture of somone else who did that with 4 wheels, good idea if you have to move it back and forth to the garage or wherever, I would just say get locking wheels so it's stable when your smoking and not rolling back and forth on a deck or concrete. Good Luck, and let us know what you do.
I put wheels on a big block once. You can't believe how it helped it's performance. Before the wheels, I'd stage and it would just sit there. Never could get past the Christmas tree. When I put the wheels on, it would run under 13 sec. in the quarter.
Wait........are we talking about the thing?