2.2 would be fine but for my proposed project i will stay under two litre. You will have 2 choices here early or late
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Late you will need throttle assy also as they are fly by wire if you intend to run ecu or swap the throttle body over to run cable. Astra/vectra look like they have a fat short input shaft yet the daewoo looks the same as rodeo
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i dont know if the flywheel can be swapped from holden to deawoo as to rodeo either
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the inpt shaft on a daewoo is 20.7 from memory and the rodeo is 25.5 i did a little research on this and it looks as if the two clutch plates are interchangable same od same amount of splines ect just a differant id so i can assume this can be overcome. spiggot may have to be changed. In theory daewoo flywheel,rodeo driven plate,rodeo pressure plate and throw out should work.
If i went over 2.0 i have a rolled over v6 rodeo in the holding yard but thats another thread on it's own
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Lizzies race car is still in the shed i could try it nothing to loose
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only a weekend or two
delco from pulsar i would think it would be a struggle with direct injection antus may be able to confirm.