This is the best tool we have seen for removing valve spring with your head installed, it makes it a one man job. This tool works with S/B Chevy with Jesel, T&D and Buick heads as well as Dodge W-8 with Jesel, FE Ford - Jesel only, Chrysler Indy 440-1 head with Jesel, and the Barton Hemi exhaust only with slight modifiction.