some claim it was a 340 cam but most say it was just a production 360 cam... it did come with a double chain, big thermoquad, higher stall converter 727 with a factory shift improver kit of some sorts and a 3.55 open rear.
The truck part was an emissions work-around, but I'm sure not in Commiefornia. Either way, My Buddy's averaged 15.90's, ran 15.60 as a best IIRC.. and still out-ran the '79 'vette 0-60..LOL...
