Nope, I said 350-375 simply by adding the kit. The stock heads will be the choke point I'd imagine, and just because it'll go to 20 psi, doesn't make it right. A 5 pound spring on a stock block combo will still show more power than any HCI ever will, and be well within the limits of a 5.0.
Yes, you did. But earlier posts are talking 500+ without mentioning stock block limitations