440 under car headers need advice.

The Schumacher won't have the flow. Looking at going the custom route. The hookers are fenderwell headers. Not cutting my car apart after I just got done patching it there.

True Schumacher flow is not the best, I run a 500HP motor with them and still run 11.50s. I know TTI headers will flow a lot better, but what are you going to do with the car, street car, race, or both. That should help you decide on a tight fitting header or a set that has room around them.