I unfortunately buttoned her back up with the HP Manifolds again. All that work to discover that. I didn't want to cut the studs. I chamfered the flange at #1 & #7 but then soon discovered that the studs began hitting #3 & #5 and just surrendered. I have to order a set of ARP bolts but since I live in Europe, the shipping time enters the "weeks" not "next day delivery".

Oh well...A winter project ahead