I need some help I rebuilt my 360 magnum Moter after the heads cracked. I bored it over .40 bumped the compression by .5% roughly. rhs heads port matched the stock intake as well as removed the center divider in it. Now I can't get it to run more than 5 seconds. I good fuel pressure I have good signal from my computer to my injectors I've replaced cam and crank sensors and double checked them. I've replaced engine ground wires. I also had my computer sent to a2 speed to tune my computer they swear up and down the ecm is good I've checked timing over and over again. I've checked with dodge to make sure my key wasn't chipped it is not. Also I hooked up a snap on scanner and it did tell me the crank sync failed but in order to sync the cam the engine have to be running at 1100 rpms so at this point I'm stumped if anyone has some suggestions I would greatly appreciate them.