after 1930 they are all straight 8's so it is long and very specific to the series and year unfortunately. 31 and above into the 50's the engines go by the series 40,50,60,80/90 and all are different size 8's per series so a 26 wont come close but thank you for answering and if you here of any 32 50 series please let me know I have been looking for a long time.