Trick Flow's PowerPort 270 heads are competition CNC ported with a port volume of 270cc. Follow this Summit Racing
link to review the various spring and valvetrain options available with both the 240 and 270 PowerPort cylinder heads. If you are using the hydraulic roller cam specified in Part 1 of this build, select Option 1 to get the most compatible seat pressure to complement hydraulic lifters. For a race application with solid rollers, select Option 2 or, if using bare castings, outfit your heads with the appropriate valvetrain components for your application. Our heads had the full competition package with Option 2, but switching to street friendly Johnson hydraulic lifters required us to re-configure the spring package. The ideal Option 1 components were back-ordered so we chose a mix of aftermarket parts to get the desired results. Summit was able to accommodate our order change and we'll show you how we adapted for this story.