For what? I’ve driven stock 318’s a lot of miles. They’re good engines. Just a small bore 340 with anemic factory breathing. Once I start buying aftermarket parts though things need to make sense. Bore size is to important to overlook when you start bolting on good flowing heads. Kind of the same with a big block. If I have a 383 block sitting next to a 400 block I’m going to build the 400 every time.
