I love the look of your boat. We bought a white and blue 1978 sleekcraft last summer and I am trying to learn as much as I can about ours. (same Model). top speed is a disappointing 58 mph. gps.at 5800rpm. 3 people 20gals fuel. 460 ford trick flow heads,je jet, aggr bowl,a-1 impeller,top loader grate. lightning headers,apx. 500hp. boat does not come alive till 4000rpm then pulls strong to the 5800. The only history i see is made in California. ow do I find that extra 12mph???????