Any Big Blocks under a flat hood out there??
Yep! I'm running a 454 with an Edelbrock Performer RPM Air Gap intake. It is topped with a 1407 carb and a 14x3 air filter on a drop base. The engine sits on stock SBC engine mounts. I did remove some portions of the underhood ribs, and the air cleaner lid doesn't touch the stock flat hood at all.
If you need a photo, let me know.