26 inch ECP in a 68 Dart

The problem is most of us dont know Engineered Cooling Products. Or how many rows is in your particular part #. Or if you have aluminum or iron heads. And how much duration your cam has. Does your car have a/c? Auto or stick? Trans cooler? What size fan you running? Was a little vague and needed some info, thats all. Lots of help on here, trust me.