Anyway, as far as I can tell, you have a 1947 Plymouth with the original block. This engine, according to my manual, is a 218 Cubic Inch, which has a stroke of 4 & 3/8, compared to the Dodge 230, which has a stroke of 4 & 5/8. I could not figure why you were looking for a 230 crank, but I guess you could make a 230 using a Dodge crank in a Plymouth engine. A good Motor Manual would be a good investment. I found a Chilton's Auto Repair Manual 1940-1953 on ebay. This has been a big help. Anyway,,,,Good Luck, & hang in there. ....Bob...........