Trying to find out more info on my Rallye 350 350 I see a QV code and A QB code . On the oil filler tube I have a number hard to read but I can make out 88 as the last two numbers any info of what that may or may not be ? According to the 1970 engine manual it could be the 88th engine ?

 

The number on the oil fill tube is the engine unit number and the only part of it that is meaningful is the first digit, which signifies the year. Of course, all that proves is the year of the oil fill tube, since the tube can be removed and replaced.