The guy that owns the motor said that three 430 4 bolt blocks were made and that this was the only one that was completely assembled for testing. When I looked at the bottom of the pistons it had MT stamping, meaning Mickey Thompson pistons and I also noticed that it had a 1969 Stage I distributor. The Holley flanged intake came off of this build also. As far as anything else in the motor I don't know because you can't see it.
Per the owner of this 430 was run in a 64 Special for several in the 1980's. It has a Stage 1 cam in it.