I have a 1974 455 engine that I would consider selling. It currently is in my 1971 GTO. It is a YU code, .030 with forged pistons, stock rods with ARP bolts, N crank, summit 2801 cam, 6X-8 heads, ported with stainless 1.77 exhaust valves added, roller rockers, and performer rpm intake. It is a great running and reliable engine that has about 6,000 miles on build. I don't have to sell, just wanting to use a correct GTO block for this car. I'm asking $3,500 picked up in Duncan, Oklahoma. Test ride before you buy. Below is a link to a video of it running.
http://youtu.be/7gn1kYf5B5k