My 28 Apache is for sale http://www.offshoreonly.com/classifi...o40763-en.html
Not a single engine boat, but if your going offshore you need twins. A simple cam change and these motors can be bumped up to 500hp and you'll be running 80+. All the bigger 500hp accessories are already there. Your going to be out a lot more money trying to run faster than that in a single engine 28 and even then the reliability will be questionable and you'll be fighting torque steer all day long.
For what you'll pay for that 28 AT, you could have a 80+mph 28 Apache with brand new engines, brand new outdrives, brand new upholstery, and a brand new paint job.
I think you'll find that the pantera is more of a sit down boat.