howdy there folks...checking the engine serial numbers and vin numbers and engine codes of my 70 lark cust vert....i found that the vin number and engine serial number to be one number off from each other? ? ?the last digit in the production number is off by one! then on my intake manifold, the firing order is missing or not stamped with the five(5)....just thought this was unusual and first i have seen this before....