You can still find a nice complete 428. They are out there you just need to be careful what your looking at. The 427's are getting expensive but can still be found. A 427 marine engine is an option but again you have the corrosion factor from the salt water. FYI I've got a NOS 428 block i'm selling if your looking for a new build. Don't give up they are still around watch e-bay for prices to give you an idea. Also the
www.feforum.com is a great place for info and parts also. Thats where I found my FE 406 tripower engine for a great price. Good luck, Glenn.