I fitted the 'Facet cylindrical pump' rated to 150 bhp. I mounted it under the car at the back,vertically, just where the fuel pipe comes through from the boot. The mounting bolts are drilled through into the boot. Its fairly close to the exhaust so I wrapped that with thermal tape for a couple of feet.
It starts and runs well, no need for another regulator and the pump has an internal filter. In truth it only really makes a difference when the car has been standing for a while.