Hi, I'm Ben, I'm 26 and I'm from Canada. One day I bought a 1937 Chrysler Royal and a 1936 Plymouth P-4. Now I guess you're wondering why I post on the truck forum. As the title says, I tried to identify the motor in my 1937 and I knew from the start that it was not original.
First off, I searched the motor vin. If I saw correctly on the t136 site, it's from a 1955 Dodge car. Since the motor is Canadian, it's 25" long and I'm not sure if the vins are coded the same way.
So, at that point, I was sure I had a 218 or a 228. It was time to check the stroke.
After that, according to a lot of forum threads, I removed the pipe plug over cylinder #6 and measured the stroke. I was a bit surprised when I read 4 1/2" on the tape. So I dug a little bit deeper and found out that I may have a 251 but i'm really not sure.
My question is: Is there another way to tell the motor size other than removing the head?