408 stroker header size
If you do hedman hussler, one of the primary tubes runs through the inner fender...its a sacrifice for stepped big tubes. Curvy under chassis or shorty headers on a 500 whp car will be restrictive imo.
IF you go this route...let me know and I will get you some measurements. I know I would have made my cuts alot smaller hand someone offered to help me. They don't come with templates or anything.