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We had previously pulled this Holley two-barrel Pro-Jection 2D system (PN 502-20S) off of another Jeep truck project and put it into storage. So we dusted off the box and put the used EFI system to work on this truck. The Pro-Jection 2-D requires somewhat frequent adjustment (depending on altitude) and is a far cry from the most advanced throttle body conversion available, but that's what we like about it. It's really simple to install and tune. However, it's only good for 275-hp. If you plan on daily driving or you're building a high-revving performance V-8 you'll likely be much happier with a throttle-body conversion from Howell EFI or the Edelbrock MPI kit.