comp 268 cam too small.

Your converter, tire diameter and gear are going to affect what cam you use unless you put the cam in for lower rpm use. No point in a cam that makes max power up at 6200 if you are cruising at 2000. I personally don't use any hydraulic cams anymore. Go solid. Pulls from a lower rpm than a comparable hydraulic. This is why a 270 solid is generally compared to a 280 hydraulic. Personally I don't see anything wrong with a 268 in your application. Clearly not drag racing with 323s