cam question

hi, the mopar specs are;268/276 dur, .429 int,, .444 exh. lifts. ground on 112 LCA. the only 340 cam different was the 1968 340 manual trans cam.as for a cam, the comp cams extreme energy grinds work very well. the xe 262H or xe 268H are very good grinds. in your low comp. motor, I would use the xe 262H cam. I've used the 262 in low comp. 340 motors.