View Single Post
Old 06-17-2023, 11:03 AM   #11
40larry
Senior Member
 
Join Date: May 2010
Location: Northridge, CA
Posts: 238
Default Re: Flathead pencil test

Quote:
Originally Posted by tim ayers View Post
the pencil test is "general" way to tell the age of the block. Like many things ford, it's not a steadfast rule. The 59l block i used for my motor passes the pencil test when, by all accounts, it shouldn't.

there are some early 59 blocks that also have the so called ledge and pass the pencil test. They have the big 59 on bellhousing and i believe they were identified as 41a cast during the 1944 1945 era. I have one here.
40larry is offline   Reply With Quote