Decibals are not going to change vs the pushrods or modulars/coyotes. Tone will be different and actual volume is going to depend on your setup.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.