ok i have an 86 SS Monte Carlo it has a 305 in it but i need to figure out if it is a High Output motor here are the numbers 14088551.ok here is another question i have got a 1963 GMC panel truck im trying to sell and it has a 305 E V6 in it and a 4 speed saginaw could anyone tell me what this motor is worth.thanks

I think you should be able to tell from the VIN. A shop manual would be the "decoder ring" for the VIN or maybe you could call a dealership service department.