I scanned and posted an Edelbrock advertisement on here awhile back. I will try and find the 1973 Hot Rod mag it came from and post it again. The ad from 1973 commented on the latest 440 engines being down on compression and thus power. It then said the adding the Edelbrock "Torker" manifold on one of these low perf 440s really made a big difference in power output. The ad then said if you bolt the Torker on a 66-71 440..."WOW!" was the word they used. Why not try both? The dyno testing done with the Torker in those mag tests in the last decade actually vindicated the Torker and its bad "out dated design" rap.