dual plane vs single plane?

V8 Valiant, the 440 is a fine piece of iron, but a little large for an A-body and a little difficult to install therein, IMHO. However, if you are determined to install it in your Valiant, I can refer you to a step-by-step "how-to" article, specifically on the subject of how to install a big block into an A-body, that appeared in Car Craft magazine in December of 2000. The article used to be online, but I'm not sure if it still is. If you can't find it, let me know and I can fix you up with a copy.