sure, you can do it... anyhting is possible. i'd say porting mk5 tech into a mk1 would be difficult though.... the new engines are all different now... not like everyhting from the mk4 down which you could just about guarantee would fit with the right combination of parts.
you'd be opening a large can of worms trying to port aftermarket ecu onto a new diesel aswell - since it would be asking yourslef to do a LOT of reverse engineering. the new diesels have complicated maps for fuel/boost/timing and i for one wouldnt like to try it without being paid to do it ... so if it were me, i'd be trying to port thew whole loom across....
why not try a late model polo dash/loom/engine into mk1 conversion....? sounds like fun
'07 Touareg V6 TDI with air suspension
'98 Mk3 Cabriolet 2.0 8V
'99 A4 Quattro 1.8T
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