Has anyone installed the Old Air a/c system model CAP-4000G-PS, which is the one that vents air through the speaker grill? I'm really hoping to get some honest reviews of this system, particularly whether it cools sufficiently, is it quiet or noisy, ease of installation, etc. My 1951 3600 has a 1958 261 with Fenton headers. I have no affiliation with Old Air, and if a reply is inappropriate for the forum, please PM me.