Hi. I’d double check that ratio at Scott says. I have a 1.47 on my 5.0…but it’s an mpi and on a performance hull. Be quite a rare pairing otherwise I’d think…especially on a boat that size and a carb. That’s unless it used to have a 5.7 in her previously perhaps ?
Anyway. I’d guess that if she is a 1.47 ratio right enough, even with a 17”…you must surely be lugging that engine and struggling to see the rpm range I’d guess. If you are managing into the 4400-4800 range, to me that would almost certainly confirm that you have a lower ratio on her. Otherwise you’d be seeing some seriously high speeds for a boat like that, if you were in the range.