Anybody run a 400 big block with a stock bottom end?

I currently have a '78 - 400 in my Magnum. The ratio mic'd out to a lowly 7.8-1 with the OE thin head gasket. I added Headman headers into a dual 2-1/2 "H" piped exhaust and a Holley Street Dominator intake. A T-Q sits up top.

If you plan on keeping it at 400 inchs, just build it like a 383 would be done. Piston replacement is a must for any decent thought of a good ratio. Once you have a decent ratio, your a go from there.