A seized engine is usually very obvious. The starter cannot turn the engine at all.
Of course, you do need to first eliminate the possibility that the starter motor has failed and the engine is undamaged.
The main resistance to the starter motor is compression, so you should remove all spark plugs, so there can be no compression, and the engine will normally then turn over very easily. If it still does not turn over using the starter then it is probably seized.
No
On the engine block. where on engine block?
The small block chevy turns in a clockwise rotation.
no
The block heater cord is on the Engine Block Heater on the 2007 Chevy Optra.
its Chevy 454 Big Block Engine
No.
No.
Engine block heaters were optional.
Many. 348 would be a small block, whereas the 454 is a big block.
You can't... There's not enough steel in the cylinders to bore it that far. If you want a 454, you need to by a big block 454 Chevy engine.
No it is not an interference engine.