On your 427w build, did you have any problems with crank/cam interference? I have a late model 351w roller block, 4.17 crank and lightweight 6.125" Scat cap bolt rods. I know I will have to clearance the block, stud girdle and oil pump housing. Do I need to be cautious about the cam profile I select? I plan to use a full size Ford style roller cam with factory style hyd. lifters.