I also own the same boat and tow mine with a 95 suburban 1500 4x4 z71, and i can feel her back there. you will rip the tranny right out of the van!!!
Robert.
It's Sea Ray's archives of their old brochures for '83-84, find the one of your boat-- there's a couple different 225's listed-- and it'll should have the dry weight on it among other info. I see 3860lbs for one, 4020lbs for another.