Here's the dimensions of the superseal ECU socket used on the PCB, two 34pin sockets are used: http://ecommas.tycoe...437287-8_O6.pdf
The PCB is double-sided with surface mount components on the underside, the driver heasinks sit ~3mm higher than the top edge of the superseal connector. The actual PCB is not large at ~165x167mm.
If the heatsinks aren't bolted to a large piece of alloy like the Extruded Vipec case then you run a good chance of bricking his $2500 ECU.
Im not going to take it apart if Tristan chooses this route. but i will say i can do many things and hiding a ECU is very easy and making it look stock,

But i still say be a bit more constructive then negative.....and throw some good ideas to help member Tristan to solve his dilema