I have a Clifford 4.0 head and a 4.2 block . Short block has forged pistons , molly rings , Comp Cams Extreme Energy [email protected] & [email protected] with .493 and .513 lift . I also have the Offenhauser aluminum intake 4BBL manifold with a 600 CFM Holley vacuum carb . Compression is at 10.2-1 ( pump gas ) . Headman headers and Flowmaster Racing 1 chamber 3 inch muffler . I have dynoed this combo in California on a dynojet dyno . This is rear wheel horsepower and torque figures , 289 HP and 301 LB FT of torque .
Have you had it wheelin yet? The motor I bought is similar to yours and the guy suggested a 600 Holley. I thought it might load up on the trail so I went with Cliffords suggestion and used a 390 Holley. It runs great but I'm sure it isn't in your league. What type of ignition are you running?
Do you smell that?[img]/wwwthreads_images/icons/tongue.gif[/img]