The f410a number is not the block casting number. It should be as six or seven digit number. Look at this page - http://clubs.hemmings.com/chevytalk/GMHistory/cast.html

The block casting number should be on a machined pad directly behind the distributor. Your is painted over, so you may have to scrape the paint off to see the number.


Paul Schmehl CI 6
geek@stovebolt.com
Stovebolt Staff: Geek