Yes. The engine choices were all available from 1/2 ton to 1 ton. you could get the 396 in the 1/2 ton and you could get the 250 (I6) in the 1 ton.
No
You could have a cracked engine block.
On the engine block. where on engine block?
The small block chevy turns in a clockwise rotation.
From scratch it would be nearly impossible unless you have a machine shop and a ton of money and time at your disposal. You could however build an engine from store bought parts to fit your needs. I recommend building a small block chevy engine as they are relatively simple and parts are easy to locate and are not that expensive. There are lots of books out there that show you step by step on building the small block chevy.
no
The block heater cord is on the Engine Block Heater on the 2007 Chevy Optra.
its Chevy 454 Big Block Engine
No.
Engine block heaters were optional.
No.
Many. 348 would be a small block, whereas the 454 is a big block.