Will these heads fit?
 

I have a 94 Trans Am and my uncle has a set of heads from a 99 Chevy Truck. Anyway he is willing to give them to me but I don't want them unless they fit my block. Like I said they are from a 99 Chevy truck with the Vortec engine. I don't think they will fit but I figured I would ask you guys first. If anything I can get them for free then just sell them.

Re: Will these heads fit?
 

They will physicaly bolt on, but they won't work. Your intake has a different bolt pattern plus those heads are for standard flow cooling and you LT1 has reverse flow cooling. If you are looking for a cast iron head for you LT1, I have a pair that came off of an Impala SS I would sell for $100 plus shipping.