Yes. The standard Morris Minor wheels do not have the safety rib of a tubeless wheel. The thin standard MM wheel is also not suited to a tyre wider than 145R14. However the Van and Pick up Morris 1000 wheels are 4.5” wide and the modern reproduction wheels are fitted with a safety rib and can be used tubeless. Beware of budget inner tubes. There is a big difference between a quality tyre fitted with a proper Michelin inner tube and fitted and balanced by people that understand classic cars.