I am running a 92 jetta 1.8L with a GTI head and sport cam in my 85
weekender, used vanagon diesel mounting components,bellhousing, oil pan  etc. so
it is laid over and fits under the lid with no cutting.  kept  the whole
vanagon control system , wirings ,ingnition, fuel, computor etc. used  an audi
90 turbo exhust and kept the jetta AFM as it had a bigger intake  throat.
runs great and gets about 23 mpg at normal running and about 20  mpg at
running at 75 mph   I love the power band  later   mark d