Looking to buy/build 500-600 fwhp 360

I think a 400hp 360 in an Early-A is already an 11-second combo.
Yur down in or very near to, the 7pounds per hp class.
Well, it has dynamat on the floor, subframe connectors, a roll bar, scatter shield. I really don't know what it will weigh. And, I'm not really into tearing through the gears. I'm not going to be shifting as fast a some of you guys. I appreciate the feedback!