From what I've found out the small engine, whatever the size, was not as common in Oz, but the 41 coupe definately has the 23", assuming its 201 as the car is stock(pic on the website), and I have a 230 to replace it, tho' I originally was gunna put a 250 Kew in the 41 but the RHD steering box is in the way, it sits between the oil pump and fuel pump and with the 250 etc cube engine having the oil pump 1" forward would mean either the steering box or oil pump would have to go and as the 40 Dodge i have is more rodded I decided to wack a small engine back in, albeit a whopping 29 cubes bigger, but it'll have the Edgy head, HEI dissy,twin carbs etc with a T5 gearbox, EA/EB Falcon wagon disc brake rear end(this will bolt up to the stock springs), P76 Discs & calipers on the stock front end..the front disc conversion is the same setup that the 40 Dodge has had since 1976, the EA/EB Falcon diff replaced the 1962 Chrysler Royal diff that had 1971 VG Valiant front rotors on the Royal hubs with XC Falcon rear disc calipers, this was used from 1976 till 2006.......I rave on a bit don't I?........lol.........andyd