7K RPM's ... Oops! Rev Limiter ???

I guess I need to install a rev limiter. After some very mild changes over the winter, we went out for a stroll to see how it would respond. Well, from about a 20 mph roll I nailed it and the tires broke loose and it was on 7,000 RPM's before I could hit 2nd gear. NOT what I want to be doing with a stock 200,000 mile short block Magnum.
WHO is selling the latest/greatest of quality and ease of installation these days ?? Thanks for real life experience in advance :)
DAMN, 7000 rpm, i wasnt planning on going Over 6300 with my mag, now its a whole new game !!