Hi Julius I have replied to your email on this direct, however looking at this update I am confused again as the numbers you give do not match up, probably due to a typo. I am also confused by the second car. In your email I was looking for 1180KB engine number, commission number was missing. Essentially: KA and KB were the engine numbers given by Standard Triumph in the UK, there were also additional plates given by AMI to correspond with the build again KA or KB, however they never matched. A couple of cars that do exist: Y4223 has the engine 1005KB Y5143 has the engine number 1397KB Which would put your car (1180KB) in this range, of which they match ST/AMI records for CKD cars however, Y4240 throws a spanner in the works with a 344KB number. for consecutive-ness. That said there were huge numbers send out by ST to AMI as kits and it would be easy to mix the numbers up. They were sent out in batches of 12 cars each with its own batch number - in the case of Y4223 it was part of DHC77 - Happily these consignments did start with DHC1 - D meaning Australia and HC for Herald Coupe. KA? you'd think would come before KB yet the earliest existing CKD, Y233 sports a 002KB number, and as it was the second car I would say it has to be original, as opposed to a coincidence. KA seems to refer to Saloons, I have a number of saloons with KA engines, all coupes/convertibles with KA numbers have later been proved to have originated as saloons. Some genuine coupes have a KA engine number and we have discovered engine changes from an original KB unit. a couple of examples, nearish KA430: G429 was 229KA G2518 was 362KA Twin carb saloons also had a KA number instead KB number - ie the coupe and tc saloon engines were the same, and in the UK both have a Y prefix, I'll let you guys work that one out!
