720 I have had 2 zr 500/720's. Much more fun of a trail sled than the big heavy 800 block. It also revs to 8400-8600 and shifts fast. It's a total blast. If you are lake riding the 1000 might be interesting or if you cruise trails like in the great white north.
No offence greensaysitall but if you aren't familiar with the term "rod" then you may be just a little to green to be playing with big block kits. From what I understand, they are more for tuners.
As he's experienced them, perhaps jbscapital can advise you just how much tuning is required to make the 720 kit work on a day-to-day basis. Eg. jetting sensitivity, ease of clutching, etc. I'd guess they're far from the user friendly pull the rope and ride sleds that the major factories provide.
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