Instead of changing the motor to a piece of jap shit just sell the car and purchase a model A Ford where you can buy everything done for you. Have some balls and learn more about the car and where suppliers are before you destroy a piece of American automotive history. As for wood in the body, Redwood would be the worst you could use. Originally they used Ash, any bits in the floor that were plywood should be replaced with "Marine Plywood". Any solid wood in the floor I would use Oak.