The problem with the off the shelf kit is that they fittings will not match the coarse thread on the back of the dash.
In the past I have had a new line made up with original fittings at Pirtek (this is no longer, and caused a nice little engine bay fire on the dyno).
I have also had a solid adapter pipe made up that comes off back of dash in the 90degree bend to the metric fittings to match off the shelf pipe kits.
Rhys