Planning my build. Phoenix, Az need some info and leads.

If I’m not mistaken there are very limited intakes for magnum heads. The la intakes won’t fit on magnum heads. I’m using a professional products air gap on my 360 mag which is drilled for both la and magnum.
As far as durability and stoutness the mag has advantages over la:
9 to 1 compression ratio
Metric rings
The heads are very good out of the box
They have a factory roller camshaft, however the camshaft lift is limited and the valve springs are limited to 5000 rpm, ask me how I know
Hypereutetic pistons
Also la heads will not work on a magnum block unless you have an early block that has oil passages for both heads or you drill it out. Almost forgot , mags have excellent pan and valve cover thick rubber gasket set up.
I would suggest a complete magnum set up to take advantages of the serpentine set up, put a cam and intake in/on it when you rebuild it. Because it the fuel injection and metric rings many mags have been opened up and discovered to still the factory hone marks in the cylinders, which you can use std bore pistons instead of boring it out.
A stock 360 mag with headers a good carb will deliver 310 hp. Because the stock cam is so small a decent cam could bump it to 340-350 hp. I have seen a few times a stock complete running mag for less than 500.
I know that some will disagree but for durability and longevity the mag is the best factory non hi perf small block mamopar built.