New 360 what time ?????

this may be the reason for lost et's , if the cam has 268 duration at .50 the advertised duration is about 306/308, if you look up the power range it should be around 4000 to 7200, to get a good low end you need at least a 5000 stall converter and around 456 to 488 gears.you are running to much cam for your setup. good luck Gary