Hans save yourself allot of headaches and wondering if you have te right cam specs. Contact Kevin or Scott at Cam Research/MPG Head Service in Colorado. Are they qualified? They compete in the Jegs Engine masters engine build competition. You will see Scott in the past Engine Masters issues. They only do Fords, as far as I know and are the great guys . Better yet, competitively priced and you will know you got the right cutom ground cam for your engine build. . You will get a 16 question form to fill out that takes everything from tire size to transmission ratio. You have nothing to lose by calling and talking.USA at 303-762-8196 Goodluck Paul IN LA