Jandro,if you haven't already,order Jim Hands book,on page 122 CVM outlines the engine that you have,with the excepting of me increasing the c/r for the slightly larger cam.You mentioned "timing dropping off".Can you be more specific?What ignition system are you using?MSD's are the tried and true at ALL level of high performance.I really would like to see your 1/8 &/or 1/4 mile times with 60 ft and mph,later,Roger