I think if you had a v6 with an eaton, you wouldn't have to worry about check engine lights. Push boost up to 20psi, and just worry about a new motor
maybe replace it with a v8
nah all jokes aside, go get a scanner and see what's going wrong. check coolant, make sure any sensors off the exhaust didn't come out, change ur oil (i blew my v6 up that way when i had a 6er)... other than that, scan for the code.