New to magnum swaps - opportunity came to me - is it worth it

Standard headers will fit. Old style valve covers will work fine.
A dual plane will be better for the street.
The single plane will command more money than a new rpm.

Is that a stock engine or create engine?
If a stock engine (out of a truck or something like that) the flywheel can be re used with a zero balance converter.
B&M has a balanced for your needs. You’ll just have to know which one. That depends on the engine itself.

The MP create engines are balanced differently than stock.

Worth? Good question.You’ll need