number help!!!

i need help with these god d@#$ numbers.i got the numbers by the water pump they are v0319tpa.i got numbers off by the engine mount its like 688 or 633.ive got the numbers off by the driver side head near the transmission it says tkz505048 i am pretty sure thats what is says.ive cleaned it as much as i could.could this be like a create engine made by a company besides gm.i dont have a engine hoist so i cant get the motor out.are the casting numbers on the head itself or is it on the part that bolts on to the tranny.2marrow ill try to get more info.please help.