Hi
Ive fitted a G50 into my 1303, I have also moved it forward 100 mm right through the torsion bar housing. I went so far forward because the Subi motor im using has variable cams and they stick out a little more than other WRX motors and I also wanted better weight distribution.
Its not a conversion for the faint hearted.
You can see more info here
http://www.clubvw.org.au/steve_carter.htm
Steve
