273 question

Thanks for all the information. One thing I know, I'm not doing the 3500.00 route.
The reason I said 318, $200 tops in a pic a part yard for a core. My 5.9 magnum was out of a truck with an engine fire maybe 5000 miles, for $250. Pull the heads and if no ring groove, rings a bearings, you’re good to go for under a grand easy.