1967 Atlas Carbs and Manifolds

Hi can someone tell me what the stock Atlas carb manifold looks like and how thick it is? My Atlas came with 30 mm Concentrics and finned spacers ( manifolds) that are bored for 28mm . Using the stock 5/16 BSW mounting studs, there is something like 12 mm of heat insulators required to position the carbs properly so that the fastening nuts tighten up. I don’t see insulators or manifold gaskets that are even close to this thickness. My finned spacers are 1” thick. Thanks

If my memory is good , thin spacer for concentric (1") , thick for monobloc (1.5") , so for 1967 and thus concentric your finned spacer are good ?
the studs full lenght should be 2 " 5/16...

Ok thanks. So one heat insulator between the head and spacer, and then just the concentric O ring up against the other end of the spacer? The 28 mm bore size of the spacer isn’t a problem given the 30mm bore of the carb?

jms said:

Ok thanks. So one heat insulator between the head and spacer, and then just the concentric O ring up against the other end of the spacer? The 28 mm bore size of the spacer isn’t a problem given the 30mm bore of the carb?

Click to expand...

Yes about the o ring and insulator, about the 28mm spacer , you can leave it or try to champher the inner entrance facing the carb , but if not some may said it add some turbulences effect which is not bad ???