The OP was asking for more HP to get into the low-mid 11's. Your reference has no bearing what so ever, other than yes suspension is very important. But he asked about more HP...don't you get it?
Petty: Eddy heads are a nice step up and with porting you'll love them! I've got ported Eddy heads on low 10 sec. cars and they are pump gas and street driven. You cannot go wrong with them.