340 engine number help

[amethyst3500]

Could anybody help figuring out what engine I have in my car? The number on the front left side of the block just below the cylinder head is FW340P32060104 and the number on the right side ot the block just above the oil pan on the right side is OB358796. It is currently installed in a '72 Challenger. Thanks

 

[DetMatt1]

The casting date on the side of the block near the engine mount should be a `69 or `70 casting as the vin that you found by the pan rail specifies that it came out of the Lynch Rd plant in a `70 model.
Casting date is hard to miss as it's pretty large and bold.