Late last fall I finally completed a deal on a 1980 Fountain excutioner/excalibur with a carbon fiber hull, pad bottom, step transome. Engines are 454 twin turbos rated at 475 HP. I cannot find and technical information on the engines, I need to know cylinder head cc volumes, cam specs, carb CFM and jetting info. I plan to do a complete restoration to factory specification, any info would be appreciated.