I bought a 6.4L intake for my 6.1 w/6.1 heads and the intake hits the block right behind the timing cover (boss where the coolant temp sensor screws in). It does not appear I can massage the intake or the block for clearance. Is the intake face taller on the Apache heads vs. the 6.1?
Looks like I would need a 3/8 - 1/2” spacer to eliminate the interference. I thought that I had seen some spacers on here somewhere but I cannot find any reference to them now. Anyone have any ideas?