350 bored 30 over with flattops. 2.02, 1.60 heads, not sure of the chamber size. Crane 1.5 roller rockers. Comp cam- 274 Int. , 286 Ex.. 230/ 236 duration at .050, 490/490 lift and 110 lobe seperation. Edelbrock performer intake with 600 vacuum secondary Holley. headers and 3 in. exhaust with Flowmasters 40's. This engine is in a 75 chevy pick-up with a stock torque converter and a 400 trans. I am not sure of the rear gears but I think they are 3.73. I can't get this thing to run right. There is no idle mixture adjustment at all. I have checked for vacuum leaks and can't find any. Timing is set at 10 degrees and to tell ya the truth, I don't have a clue how to check the overall timing. This is the first engine I ever attempted to build and I want to learn all I can. Any advice will be greatly appreciated and I will try damn near anything to get this thing running right. Allright let me have it.