68 vs 69 front discs for 318 barracuda - same?

Carquest had them, but were over a $100.00 apiece. Seems kinda pricey. I put a set on my '67 Barracuda ( kelsey-hayes 4 piston) and was quite shocked when they told me what the rotors cost. I here those kelsy-hayes jobbies have very low drag almost like racing type aftermarket brake.