Where to start with this

got my eye on one of these Mega Squirt units prebuilt from
http://www.extraefi.co.uk to run some throttle bodies for Puma 1400 is what we want to do. Big problem is how to fit the fucker so all the dash works, being honest i rather pay someone with experience fit it for me so the big Q is who or where will touch these? Or ther isn alternative ecu could i use better suited?
CJ