Mercruiser Thunderbolt IV distributor  fits 4.3LX 4.3 v6.  from a 1993 4.3 showing 21 hours.  this is in excellent condition. original cap and rotor, like new.   tested and works great.  Never used in salt water only fresh water. we only ship to the lower 48 states by ground shipping. no po boxes.  Please ask any questions before you bid  Thanks for looking