As far as specific engine specs i forgot, they told me everything in detail, sizes, diameters, tolerances all that but it was over my head so i dont really remember details like that. What i do know is that mark kidd ( owner of magic valley engine/kidd performance of twin falls idaho) was very professional at what he does, made sure we were testing at the proper altitude/air pressure and all that confusing stuff. And he was using 91 octane, what he recommends i use on the water.
And i cant seem to post pics! I have a ton of them!

I'm new to jet boating and love it- first off!!!! But was wondering if any one has any idea how fast i will go. I have a 77 Tahiti 18 ft. Quarter stringer, 460 bored .60 over, flat top pistons, Dove heads polished/ported/surfaced, roller rockers,  Hydraulic flat tappet cam, tunnel ram, Dual 600 holleys, 10/1 ratio, 9 qt oil pan,  msd ignition, good coil, high volume fuel pump, high flowing oil pump,  Berkeley jc completely rebuilt with an A impeller and a manual place diverter. Dyno test says its doing 452 hp/501 ft. of tq.($6800 later!!!!!) all this done this winter cause of a spun bearing from the summer. The weather is not warm here yet so i cant test run and I'm dieng to take her to the water!!  Any ideas and or tips would be very helpful!! Thanks for reading!