took my brothers boat out this past weekend for tuning and got a best of 69 mph out of it with two 200 lbsers and 20 gallons of gas wich i didnt think was to bad for his combo 83 bahner mini day cruiser stock 454 with basset thru transom headers performer intake holley 750 vac secondaries hei and comp cams 292 hydrualic cam and set back pump berk jc no diverter stock rock grate and no ride plate . plans are to put diverter and ride plate to help it over in to the 70's