Quote Originally Posted by sleeve396 View Post
Well, like Pat says Hardly any real difference between those 2 but if he said u have a straight 402, I am willing to bet he meant a 1974-72 block, best way is to look at the engine stamped code that is on the end of the block. on the pad just under the alternator, assuming that is the passenger side of the truck. My guess you will find a CLB code motor
.. i put both my hands on the valve covers and can tell you how much power them BBC can make