Ok. I haven't posted on here in some time but work, family time, and g body time doesn't give me much time. The 83 Calais got put on the back burner and the 87 Monte SS got put in its place. It got all new suspension, blazer brake upgrade, rebuilt rearend, jeep steering shaft, L79 327, T5 transmission, cowl hood, and a bunch of other things. But I am getting ready to drop the 327 in it and before I do I want to have all my parts and everything ready to go so I can fire it as soon as possible. My question is will my flowtech headers have enough clearance for the AC box? Number 8 tube on the passengers side sticks off the flange about 8 inches. I measured a cutlass parts car I have sitting around with a sbc in it and it looks like it will be very close. I am putting all my AC stuff back in and will be completely functioning but I don't want to melt my box. I've searched all over the forum and every thread I've read, nothing is mentioned about clearing the AC box. It seems most of the guys on here suggest flowtech headers and those are actually the ones I had from a prior transaction from a Malibu guy. Any input would be greatly appreciated. I also have angle plug heads but I don't think that will be an issue with these headers. Its just the AC box. Is there another brand that would be better? I have been working on this all winter and I am ready to drive this thing!!! Thanks!