86+ later 305 or 350.

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.i had posted this before but no one wanted.

Dont the newer blocks have either "305" or "350" cast into
the block just behind the driver's side head? Or do you need
more info as to what it is?

the engine is still in the nova(but its not the orginal motor).and its hard to get back there.ive heard that it is posted back there but i cant not see it if it is back there