VIN WK41E61187780 BODY NUMBER ON RADIATOR SUPPORT SS04301


I have a 66 Dodge Coronet Deluxe police package car. The engine in it now is a 318 poly...I was told it was built with a 361 in Detroit and the engine later was changed. However, VIN decoding services dispute each other...some say the engine code E is 318, and some say E is 361. The shop manual says 361.
The number stamped on the radiator support on the driver's side I listed. What does it mean?

A MOPAR enthusiast who examined the car the other day is convinced it came with the 318 as to switch from 361 to 318 would incur modifications and he says it looks stock. His VIN decoder book says 318.

Too many conflicts..which is correct? The fender tag on the lf fender support is not there and I don't have the build sheet...
Help please?

 

Correct the E indicates.361. But........The poly wouldn't bolt up to the 361 tranny. 361 is a big block and nothing interchanges with a poly engine. Not that it can't be done. Love that cruiser!! I was a cop for 38 years and it makes me wish I was a rookie again.

 

Have you checked with Bob Mosher? Or had him look at it?