Or , you could just enjoy them . <| sep |> People are still running Ford flathead motors with side valves . Overhead valves operated by pushrods is high tech compared to those Ford motors that people still love to use . Have you ever done much with multi overhead cam engines ? The Ford 4 valve engines from the 90 s are Satan ' s own spawn unless you have a full shop with all of the tools to work on them . I like OHC motors and they can Rev higher and give you more power . However there is a right way to implement it and a wrong way . Belts that are hard to replace but need to be every 50 k or 60 k miles is wrong . There is nothing wrong with using a chain that can go 200 k miles without issues . Not needing special tools that cost 100 s of dollars and are only needed to hold the cams in their position or to clock the cams after doing repairs or upgrades . It ' s easy enough to design a system that ' s simple to work on and delivers good power . There are plenty of OHC engines that are like that . I don ' t know why some manufacturers try to reinvent the wheel and just make things more difficult without getting any better power or reliability out of the engine . A simple and intuitive design is why pushrod Chevy v 8 s get put into every chassis they can be shoehorned into . It ' s cheap , it ' s simple , and it works . Just keep it under 7500 or so rpm and everything is fine . We wouldn ' t want any valve float would we ? Which is an extremely interesting thing to see on film with a strobe light or in ultra slow motion . Valve float videos on YouTube are worth the watch .