Magnum heads on LA block H.p increase

Reading through this post hearing the pros and cons of the magnum heads and just wondering how fast some of you guys have gone with them. I’m honestly impressed with what I’ve seen out of a set on a friends engine. What do you guys think a 408 magnum engine with a hydraulic roller, flat top pistons, ported magnum heads with 2.05 intake valves, 750 alcohol carb, powerglide, at 3200 pounds. What do you think this combo would run in the 1/8 mile.