[meford4u]

You hit the nail on the head with the JRSC being a mild boost. Typically stock it is in the 5-6 lbs of boost range, and with the shaved racing head it will increase to 9 lbs, so still very safe. The guy I bought the head from said he was changing out his setup from this head to a turbo with 18lbs+ of boost, and there was no way the engine would take that with a racing head. He Dyno'd his car at 230 whp without the JRSC.

Hey Dan, you have anything to add to this. I know that you have researched the JRSC alot more than I have.