Which brand header is the best?

I thought I heard somewhere that if you used a Clifford intake that you also had to use the Clifford header due to clearance and bolt-up issues!! Is that not the case?? Just wondering!! And gents, those are some beautiful powerplants but the way!!! Geof

Only problem I have encountered is the Header/Intake flange being different thicknesses,which anyone can compensate for with ground down washers !!I even entertained the idea of bring the intake to a machine shop and let them grind it down to the same thickness as the header !!:D