I run a 23" x 6" x 2" chargecooler radiator up front of my bug in the spare wheel well, I have put a scoop to push air up into the well and removed the area behind the cooler which is just in front of the beam. I have enclosed the cooler with aluminium sheet ( removeable ).
I use a bosch pump from a Ford focus MK1 RS, this sits at the back on the frame rail. I also used a water additive called "water wetter", this aids heat transfer.
My inlet temps at most are 20c above ambient even when sitting at speed on the motorway or generally thrashing my bug, running 15psi boost.
I have thought of fitting a meth kit if I couldn't get the temps down, but managed it with fitting the bigger cooler up front. I also prop the bottom of my engine lid open to aid fresh/cool air into the engine bay.
Any questions please ask.