Adjustable Rocker Arms

The 273 rockers are very durable and are likely a bit closer to the correct ratio than the stamped hydraulics. But the ratio still isn't as accurate or consistent as a good, quality aftermarket rocker. The worst thing about them are their OEM adjusters. They can back off because of no lock-nut. Spotfacing for the adjuster and using aftermarket adjusters is a good upgrade. As for "cheap aluminum", you get what you pay for. I use Harland Sharp, but there are some adjustable aluminum & steel rockers better than 273s. I just haven't run any others.