Looking at an old race boat project and considering going from a single I/O to OBs on it. Wondering what I should expect to pay for the transom work to seal up the transom (or replace the transom)?

Alternative two would be to convert it to twin I/O (small blocks) any thoughts?

Like I said, not looking for a formal "quote" but trying to compile a budget to see if the project makes sense or not.

Thanks!