Reason i was asking was to let you know the typical LS truck manifolds won't fit that great. I've been battling it for about a week and finally found the perfect set. The 2010 f-body manifolds work perfect. For me the truck manifolds will have one of the three studs hit on the passenger side and overlap the frame by about 3/4"-1", and then on the driver's side the flange will fit inside the frame about half way down making it hard to run the exhaust out of the frame channel at a pretty sharp angle. It also hits the top of the frame as it passes (so every time you rev your motor, it'll just hit and grind in some more). I'll post some pics of the stock truck manifolds. Here's where you can find the pics of the F-body ones.
http://67-72chevytrucks.com/vboard/s...d.php?t=505425