1974 valiant stalls in gear 225 automatic

Don't use carburetor cleaner to check for vacuum leaks. It can degrade vacuum hoses really quickly, but the biggest danger is finding a spark and causing an engine bay fire. I've seen it happen first hand. It burned right through a rubber fuel hoes with the engine running. Before we got it put out, it had burned just about everything in the engine bay that could burn. It was a huge repair. Use water in a squirt bottle.