Quote Originally Posted by GTPpower View Post
If you go to the dealer and ask for the part number for a 3800 lifter, it is the same part number as the LS7.

I've never heard of a difference (size wise) between the two. I will do some measuring on Satruday.
Because the numbers have been superseded numerous times.

LSx guys seem to end up with .050" larger pushrods after an LS7 lifter swap.