I`m using a powermaster gear reduction type starter that I pulled off a big block v8 with the straight pattern on my 292. Got interested in this thread and tried both a 153 and a 168 flexplate and because the starter has 4 holes allowing it to move away from the block it works well in both applications. I am using pontiac bolts (1/2 in.) and got neww dowels from the machine shop. Hope this helps.
