I have a 1998 A4 1.8T, it came originally with a AEB engine, i have since fitted a APU block and head which has after a very short mileage died. i liked the AEB because of the large port head which the APU doesn't have. However I notice the AGU transverse unit has forged crank, can these blocks and head be used in longitudal formation? i realise that a complete engine with all external components such as turbo charger and manifolds won't work, but i was thinking of using the original AEB components. Any help will be appreciated. ps. on the APU the crank sprocket has decided to undo itself by the looks of it., is this a common fault? weird as it wasn't touched when i replaced engine over, but after 25 miles disaster struck.