Register different engine to the chassis.

Hi guys just wondering how hard do you guys register different engine to the chassis at vicroad? I've changed from b18c7 to b20 block. Any fees etc.. Information would be great!!! Thanks

http://www.vicroads.vic.gov.au/Home/...ifications.htm

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http://www.vicroads.vic.gov.au/NR/rd...s_1012_WEB.pdf