i got 12.5to1 compression ,,i got a interstate 700cca batt thats almost 4 years old,,thought it was bad had interstate check it said it was good ,,maybe it just dont have enough ccas to start it when it gets hot ,its a fresh motor too,i got i ford mini starter on it,,summit book said they were only good for 10.1 compression,,,i dont have checker to check the starter hot amps,,,i might new another starter too ,,you think???