426 Engine swap for customer. How much to charge?

[speedfreek]

I have an 02 yzf426 dirtbike and my friend has a 400ex with a blown transmission. He wants me to sell him the 426 engine and install it on his frame. I told him I wanted $700 for the engine and electronics(which is a steal). I dont know how much to charge him to do the swap. He will be buying all of the parts needed for the swap.
How much would be a resonable price to charge?

[JOHNDOE83]

Theres alot of work involved in a motor swap, could get expensive, theres more to it then just making some new mounts.