I think your on about my old car - stg1 turbo T3, jamsport head, kent 36 and made 161bhp unchipped. i sold the car to turboboy67 before he sold it on to another member

T3 is the easiest conversion going providing you have all the bit's ready to go.

The oil return to the block has to come from a ERST and ford stopped selling so you'll have to source one of those first.

I bolted everything up and towed the car to a powerflow centre and got them to make a downpipe on the car - it was about 5 years ago but cost me £45.

Options for the rad are:-

Fiesta Si (if you run front mount) 33% extra cooling area
Alloy rads are normally slimmer