Can I run 360 la extractors on a 360 Magnum

Yeah the bolt pattern is the same but the ports are a different shaped. The la360 ports are much longer top to bottom. they go so low that where the bottom of the manifold port sits against the head for there's only 1mm contact. The Magnum heads are the same as the 318 ports
I'll try and post a pic when I get back
The center ports have a wider margin between them on magnums...same width from port to port/bolt to bolt .
The headers will work if you have a muffler shop weld a bead across the bottom of each port then grind and file.