My one owner '73 145 is D-Jet equipped. My guess is that all of the U.S. models of the 140 series got access to the D-Jet B20E (10.5/1 compression) and then in '73 to the B20F (8.7/1 compression) at the same time. For emissions certification purposes this would make sense for Volvo to keep costs in line.
In the U.S. K-Jet pushrod B20Fs were a first year only configuration, in '75. The pushrod B20 was never again offered in U.S. spec 240s after '75. Also there were never any carb'd 240s in the 'States. All U.S. 240s had the OHC Redblock engine starting with the B21 in '76 in one injected form or another all the way to the final year of production in '93.
Turns out I have a lot more electrical schematics than I first realized. I also have a Haynes 140 Service Manual which covers the full range of 140s - sort of. In the models covered by the Haynes manual it lists both UK and USA models. For the UK it lists a 145, 145S and a 145 E (not sure what the difference is between 145 and 145S). For the USA it lists, starting in 1973 a 145 and a 145E and there is a footnote that infers that California only received fuel injected models. Prior to 1973 it was only a 145S that was available. From this I infer that the 145E started in 1973; but, might have been a California only product with the rest of North America getting the 145. From the Haynes manual, I cannot determine whether the UK 145E started in 1971. The Haynes manual does not include a wiring diagram for a 145E.
If you check the VIN on your car it may yield some clues about availability. The VIN will have 7 or 8 digits followed by the serial number and for your 145 should be something like this 1456xxxx. The 145 because its a 145 and the 6 because its a B20F. The 5th and 6th numbers are body and transmission details. The 7th number is market. If the 7th number is a 3 that means LHD not California. A 4 means LHD California only. If you have a 4 in your VIN, that suggests that perhaps only California received the 145E. If you have a 3, then that confirms that the 145E would have been available outside of California.
As best as I can remember, Canadian 240s also only used the B20F in 1975. However, the B21 was available in the low cost models with a carb, no catalytic converter and less horsepower until at least the end of the decade.
