I took my 68 mustang with a new 347 that I spent a year building to UMS for break in and dyno tuning. They worked through the bugs that come with a new build and were very patient as I ran around town getting some replacement parts. The tuning was flat out black magic - Tony is a wizard. In short order he was able to pull ridiculous numbers from my engine with a very safe tune. I'll be going there with all future engine builds. Pricing was more than reasonable. I recommend them to everyone. Very satisfied customer here!