I have run a 250 damper on a 292. The problem I encountered was, it slipped the rubber bonding the damper together after one run. It would also do this to a regular 292 damper. They would last 4 or 5 runs. I am presently running a 8 in. damper for a 350 v8. I first used a used one, it lasted a season before slipping. I installed a new one and so far it has not slipped. On both the 250 and 350 dampers the timing marks do not line up. It must be remarked for the 292. Hope this helps.
