OK just so we are all familiar with what I am describing... I tend to steer clear of describing turbos by their GT1749xxx description, as I find the Garrett part number does a much more specific job.
720855 range of turbos. PD130 fitment for vehicles with left-right engine mounting, with integral manifold. (I believe its the GT1749VA but don't quote me?) Same looking and external dimensions as the 721021 range (GT1749VB???) 150 Bhp unit but with different wheel sizes.
717858 range of turbos. PD130 fitment for vehicles with north-south engine mounting, with seperate manifold. Identical internally to the 720855 range.
My query here regards the 130 units. If you had a 720855 unit and a 717858 on its manifold, would the two interchange on a vehicle with the left-right engine configuration? Does anyone have any experiance in this? And when I say interchange I mean bolt off the turbo with the integral manifold and bolt on the one with the seperate manifold? I have hunted down some images from Google and the actuator seems to be mounted in a different position and the clocking angles appear to be different. I guess this is because the engine is tilted further over in one installation than in the other?
Anyone with experience in this please pipe up now!
Cheers.