Can the EZGO 13HP Kawasaki engine be retrofitted to an older TXT cart?

Hi there. I see this advertised as a replacement engine for 2012 to 2015 RXVs. on the EZGO website (for non golf applications).

Can this 13HP Kawasaki replacement engine be retrofitted to an older TXT cart? (Mine is a yr 2000 TXT.). I know this wouldn't bolt straight in, but how difficult would this be?

Thanks in advance for any info.