Need to get out and read your rule book some.
Cut and pasted from NAMBA rule book -
c. Appearance i) The boat must have a sponsored paint scheme with sponsored IDs and U numbers on the boat. ii) The boat must have a human driver figure in a front or rear cockpit. The driver must be a scale of 1/8 to 1/6 in relationship to the size of the boat and wearing a life vest and helmet. iii) The boat must run with an engine cowling or dummy engine to cover as much of the boat’s engine as possible.
Cut and pasted from IMPBA rule book -
2. Hull Specifications a. Boats may be wood or fiberglass/composite type construction. b. Length shall be a maximum of 56 inches, minimum of 47 inches. Width shall be a minimum of 22 inches. c. All boats shall have a front or rear cockpit with driver figures from the 1950s - 1970s era, no cartoon or animal characters. d. All boats shall have a sponsor name & logo. The Sponsor and/or logo may be original or of your own choice. e. Normal hull configuration shall be conventional round nose, shovel nose, dropped sponson or pickle fork design. The pickle fork shall not exceed 10% of the hull length and be modeled after a classic era boat (1950s-1970s era). f. The ride-pad of the sponson may extend up to 1/8 inch beyond the sponson transom. No rear sponson, or other riding surface allowed aft of the sponson transom. Engine belly pans are allowed. Engine belly pans may not extend beyond the engine compartment.