hi mate, i front mounted mine and you can do it for next to nothing.
i dont know why more people dont do it, the core has been proven to cope with 400bhp+, im running upto 1.6bar through mine and my oil temps dont go above 95c.
paul randy welded my end tanks and did a top quality job.
i followed the fitting guide from the gtiroc roughly but used 1 metre of 58mm pipe for the turbo to intercooler section as it gives the best fit and thats the size of the standard pipework. the turbo to plenium side is 1 metre of 63mm pipework.
the washer fluid bottle goes in the boot, costs nothing and the power steering cooler needs cutting which is messy if you dont empty the system first
more people should do this instead of spending out on aftermarket cores that arnt reallly neccessary. :roll:
if you decide to go ahead give me a pm