The recent thread about the beautifully restored 2520 got me thinking. Why did Deere choose not to offer a row crop in the 60 and 70 PTO hp class when they went to the 30 series in 1973? The drive line could have been pretty much 2520 and 3020 components with the 2630 engine taking the place of the original 3020 motor. The tractors would have the 30 series styling and features therefore have the possibility of being equipped with SGB's. IH did quite a bit of business with the 544 and 666 and Oliver did quite a bit with the 1655. Using the 20 series design would have meant no huge development costs. The big limitation in my mind would have been availability of factory production time as the 1970's were a boom time for the Waterloo Works. An updated 2520 with SGB would have stormed the market with the only glaring shortcoming being no MFWD.