Here's a funny one. When I want to Canton to look at and get the Valiant, I was disappointed that it had a 170. Of course, getting it home and getting it runnin, I realized it was very snappy. So when I saw the 170 in this bunch, I was almost jumpin up and down. Kitty said I was like a little kid when I saw the short bypass hose. LOL
170's are getting harder to find. Only made from 1960-1969 (68-69 had the large crank pilot hole). Many cars that were born with a 170 have had 225's swapped in over the years.