My dad and I are converting our 1994 Extended cab with a V-6 to a carbed 355 with trick flow heads. We tried using the Advanced adapters headers, but they are too tight for clearance on the first pair of spark plugs due to the angled outlets. We tried V-8 vortec truck manifolds, but they cause clearance problems toward the rear of the engine and the frame. They are too wide. Which factory manifolds are the common ones used for the conversions for the S-10's and will not require notching the frame?