The V6 4th gen has always been the busy forum. If you look at post counts, 4th gen is by far the most active. From there it is V6 then LT1,,,, I think that is because of some of the huge LS1 sites. Most LS1 owners hang out there.

 

True,LS1Tech is very active with 4th gen LS1 owners, great place to shop for parts as their ad section is huge and quite busy.
I for one bought my LS1 SS Camaro because you just don't see them everyday,you see Vettes,newer Camaros,Mustangs and Challangers all the time but a 4th gen SS Camaros not so much which makes it kinda fun having one.