Just read about Traxxas new big block conversion kit. Looks and sounds great, was going to put a Sirio or P2 in the Revo using the New Era kit, but this one looks even better. The Traxxas kit gives you everything you need for a "Factory Fit" and "Look". Included is a forward only conversion kit, a header that connects to a standard big block and uses the Revo pipe, a Traxxas 40mm aluminum Flywheel to aid in the bumpstart process(no pull starter since it will not work with the manifold, and Traxxas says the .21 is too long for a proper BB fit with the Pull start) the mounts accept a standard bolt pattern, slide carb, BB with back plate and SG or Traxxas IPS style shaft. Bump Starter required. No mention of any specialized starter box, that would be nice, will work with stock clutch bell/spur combo or optional ones. Price is around $50 and comes with DETAILED instructions. I got this info from the Traxxas site and it look like a very nice kit! Only downside I see is the use of the stock Revo pipe, but I am sure many will put out aftermarket pipes for us to try....can anybody say CMB Raptor Revo....YAAAAHOOOO!!