IMO, I'd runa different cam, and a solid flat tappet. Is there an y particular reason you want the hydraulic? A couple notes... You will need to replace the valve springs with the ones you cam manufacturer specs. Also, IMO the heads should have the valve job checked at that time and corrected by a shop with high quality equipment and the intake ports gasket matched with your intake. Using the high-lift lobes will reuire you to run a high zink oil, or a quality additive with every oil change. Just accept this and make sure when it's assembled you check for lifter rotation and set the preload carefully. Lastly, get a larger carb. I like the 870 Avengers for these engines. The HP950 is another good choice.
