So I think the previous owner lied to me a couple times...

How can I tell the difference between an E7 and E6? If it helps, there is a stamped 5 on the corner of the heads.
Also is there anyone here who can identify the year of the block for me, if I provided the numbers

 

put the numbers up for the block and only real way to tell difference on heads would be to pull them and look at casting numbers and cumbustion chambers

 

There are ways to tell if you have the casting numbers, heres a set of E7s

This is the underside, you cant see this unless you remove it, or remove the intake and get a small mirror or something..


This "T" is under the valve cover

 

Why did they put E7T's ( truck headers) on these engines? According to the codes, it belongs in the truck family.

 

Because they wanted us to spend more money buying better heads