I have taken my Engine apart , and the pistons are marked 428,super, are they original ,the car is a 428,mach 1 cobra jet ,my eng block has 352 - 67 and 352 - 41 on it , the diff has diff 86 ,if i rotate the rear driver wheel the oppisite wheel turns ,if i rotate the right rear wheel the left one does not turn,,thanks Hank mc nab

 

YUp those are the stockers.

I cant help you with the decoding and am not sure what you are asking about the rear that just means its a differential.

 

it's an open rear or the clutch pak is gone