i wish i had a pic to show you on how the gauge cut-outs are uneven, exposing a gap between the pod and gauge. the top of the pillar would stick out, not flush, unless you do your own trimming if your that good. i went through two because i thought i had the skills. bull f**king ****, i'd rather turn a wrench.
i have my turbosmart e-boost2 w/ shift light at eye level on a lotek 3-gauge a-pillar mount; below it defi amber fuel pressure and egt gauges. on a competition concepts cf center pod i have a oil temp, oil pressure and water temp gauges.
if you really want them on the a-pillar, the BEST thing to do is buy THREE of defi's fitting kit (if you have three gauges, one for each) so you can mount them where ever on your a-pillar with two small holes for each gauge...that's all you will need they are 15 bucks each.
i have my boost on the a-pillar.
you don't have to worry bout fitment issues either.
i used a Greddy single 60mm universal A-pillar pod. When you first get it in the mail, you realize it won't fit right, but your wrong. Using a heat gun the black plastic is softened and conformed to the A-pillar. I will get some pics and post.