I adjusted the rockers on my SBC. A buddy tells me to set zero lash then tighten 1 full turn more. Now it feels and sounds like I am running on 7 cylinders. He swears he is right. I thought fine. Checked timing and it still sounds like crap. It felt like a fouled plug so I changed them. Still sounds like crap. I changed plug wires because one of them got into the headers a while back. Still sounds like crap. I changed cap and rotor. Still sounds like crap. Put fuel dryer in the tank thinking I might have water in the tank. Still sounds like crap. I am going the go out tonight and re run the rockers and pre load them with a 1/2 turn past zero lash. Any more ideas? The old truck gets sideway hitting 2nd gear and runs like a stripped ass ape but just dosen't feel or sound crisp. In ase anyone wants to know what I am working with here it is. The block is a ZZ4 9.6 to 1 copmpression with Dart Pro 1 heads, ZZ430 Hot Cam kit, 1:6 roller rockers, air gap intake and 750 Holley DP. It has a 700R4 and 3.73 10 bolt posi.