8ba Distributor Clocking

[Shoebox]

I'm using a GM distributor converted to flathead use by Jim "Bubba" Linder RIP, in my engine build. IF I were to use the retention plate the vacuum can is pointed to about 5 o'clock, I'd like it pointed more like 10 o'clock. At this point it looks like I need to remove & relocate the plate with the dist clocked where I need it. Before I start modifying things, am I missing something? I thought that Speedway offered some kind of clamp, but looking in their last (and I do mean last, not printing catalogs anymore) there is a complete front cover with clamp, but I'm beyond that. There are a lot of these conversions out there, would like to hear how folks dealt with this. Thanks!