My friend has a 422 inch stroker with ported/iron W2 heads, TTI 17/8 headers, roller cam which is streetable but rowdy.

We dynoed it with a 750 Holley, A stock 800 cfm Thermoquad, and a brand new OTB Holley 950. The 950 made the most power by 20 HP over the others, 525HP/510TQ.