Bare EQ Magnum heads vs. machining stock Magnums?

That's the thing, I'm not sure if the budget supports it... $700 is already pretty steep, I have a hard time going much over that. Sounds like it's worth it but I'm getting really tired of my Duster sitting in my garage with no engine, I'm gonna have to get creative with funds here... currently I drive for Lyft to make money as I'm also in grad school but it's summer now, no classes.

Anyway I need to call the machine shop pronto and tell them to not proceed, if they haven't already