Weight should be fine. 2 issues that I see:
1. The J30 has a deeper keel from the bottom of the hull. You'll have to be able to adjust the pads up enough, but that should not be a problem if you are creative.
Right. that's what i was thinking. the question is how do i find out hot much i need to raise the pads? I have looked over the specs i can find online however no body mentions how tall they need to be...
2. Bigger issue. The J30's center of gravity is behind the keel a bit. Not sure how much. You have to get that center of gravity in front of the rear wheels on the trailer. Otherwise it's going to go nose up and and worst case dump your boat or wreck boat, trailer and tow vehicle.

worst case??? ya think? yeah!!!! hahaha
so basically it might not be long enough to get the COG in front of the rear axle...
thanks Mark!