I have done 3 Caddies with 1.9 IDI (in USA)for NA exhaust I use early (pre-'81) factory double down pipe, with 16mm spacer at manifold to down pipe connection. I hear you can use a later model exhaust from 8v 2.0l gas (taller engine) but 'header' (tubing) fatigues with diesel vibrationUse a bit of hammer on timing belt cover(around pump gear), and 16mm offset bracket for center bolt on sameThat's about it. Ez swap ~6-8 hrsHow much for 1.9's in your area?In US we get 'New' long block for $2000USDWe have no used source, as 1.9IDI engines only went to Canada for NA market