Posted by Shawn S on Monday, June 28, 2004 at 6:02PM :
In Reply to: 413 in 73 motorhome-help!!!!!! posted by michael lisle on Monday, June 28, 2004 at 2:03PM :
There will be an id pad on the front driver side of the oil valley. Scrape of the oil and dirt and it will have either 440, 426, or 413 stamped into it. If it is a 73 413 it will have a "J" and then 413 hand stamped into the top line of the pad.