does anyone know what cars would have a 400 yoke for my turbo 400 that i could grab from the junk yard?

 

Any car or truck with a 400.... basically, any big block car or truck, from the mid 60s to the mid 70s; and big block trucks after that.

Be careful to get one from a 400, not a 375; a 375 looks just like a 400 but uses the PG/350/200/700/T-5 yoke.