modded 1.5 is what i'm looking into too mate..
Think i'm gonna go with a 1500 block, and 1.7 crank to get the 1.6 thing going on.
had heard that the camshaft and carriers from a 105hp engine can be transferred to other heads ( no-one has confirmed this tho), so what about the 1.6l block from the 145 with cams and carriers from a 105hp 1500?
If you gonna strip the bottom end, then i guess its worth getting the crank and stuff lightened, balanced and polished etc.. and almost certainly worth getting the block skimmed to mek sure its proper flat.
If the 145 engine uses flat heads, then earlier 95hp heads would bolt straight on right?
If they are chambered, then the later 105hp heads would bolt straight on.. Looking at the manual(s), there are a few variations in combustion chamber volume, so it may be possible that using the early flat heads on the 145 block would give a healthy increase in compression.
However, i once owned a 1.5 IE, and it seemed to be a fair bit pokier than it's stated 109hp..