Hey guys working on a car i picked up for my wife, it's a 72 340 Demon was an export car as i was pulling it apart i noticed a large difference between the build date and the casting date on the block and just assumed it was an engine swap car. today i am out in the shop with a buddy and we got to looking at the vin# and it matches the car! the block is a 1-15-71 and the cart is 4-72 this is a big stretch to me is this possible? or likely? the other thing i find odd is the pistons are 4 valve relief and look to be low comp which does not work with a 1-15-71 block but could very well be for a 4-72 340. is it crazy to think they had blocks kicking around that long before they assembled them? any insight would be great.