I purchased Rod's 421. I'm braket racing with it. It's very low maintenance and makes a lot of power. I have ran 6.08 at 112 mph. My car weighs 2885 with the driver. I'm upgrading the car at the moment. It had 1 5/8" headers and was running race gas. Laverne Ferrouillat is building me a set of 1 7/8 headers with 3.5" merge collectors and I've purchased a pro systems alcohol carburetor for it. I believe that it'll go 5.85 when finished. Rod and Vic are very busy right now and they are working on a off set rocker head. I'm really pleased with the performance of the stuff that I purchased from Rod I have friends with w2 engines that don't make as much power as my 421.
