by rebuild i mean that i tore the engine down to the block , crank, and pistons ,.. had the heads checked out , and then i put it back together with new gaskets , seals , new cam and lifters , new oil pump and shaft , new rocker arms and push rods , new starter , new distibutor , new timing chain and gears , new 750 cfm Q-jet carb (for sale BTW

PM me ) , new water pump (yea i know LOL , but its the berkeley packajet setup )
so all the work putting it back together is on me ,.. the reason i did all this in the first place was because somebody in the past removed the thermostat in the motor and the first run i had the boat out it was blowing water in my oil after a few hard runs and the motor never heated up , so i lost oil pressure and broke a lifter and hopefully i didnt crack a head :-(
after the "rebuild" the motor didnt even have 10 minutes of run time on it , i never even had a chance to break the new cam in before it locked up ,.

and its not a high HP application , just a stock olds 455 from a car that has the "J" heads and "F" block,..small log ex system and a stock pump setup ,.so i think something actually failed in the motor from not having a thermostat and blowing water in the oil ,.probably killed a bearing ?? . i never knew it had water in the oil untill i drained it all out and assumed (

) my temp gage was broken since it read 110 * but the block felt warm to the touch , so i never knew the thermostat was missing untill it was too late
