It was done back in the 90's. They used a bored out PG block iirc. One thing to keep in mind is that the increase to 2.0 will necessitate a 62 mm G-lader pulley to get your boost up to 14-15 lb vs a 1.8l motor would normally be at 18lb. Talk to Derek @ scientific rabbit. The power comes from porting/polishing the head w/ 7mm valve stems.
My 1.9l with a 65 mm pulley puts out almost the same boost as a stock pulley due to displacement increase. I'll have the MFA check the boost press tommor. My big power increase came from a Stg III SR (otherwise stock) PG port matched head/exh/intake.
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