How strong is stock Mopar vs Csb?

Hi
I am new at Mopar and wonder how much power for example a 318 will hold up to.

Is the 318/5.2 magnum stronger then the LA 318?

I was going to build a 500-600 hp when I read that original blocks do not hold up to on much more, but I wonder if this is really true as it seems a bit low:burnout:.

It seems had to find cheap Mopar aftermarket blocks.
What is weakest after the block? The connecting rods? how strong are those then?


I have seen a stock Chevy 350 in a C4 corvette here in Sweden that had around 900hp on stock short block from 1984.


What is needed to make a 318 handle 1500hp? Is it even possible with a sensible budget?