Update......After a long process of considering the options of driveshafts, I ended up ordering a 3.5 inch chromoly driveshaft with slip yoke from Mark Williams enterprises. MW prices were competitive with everyone, and they seem to be tough to beat with quality and balance process. MW was not in favor of using a 3.5" aluminum driveshaft with my application, mainly due to the car weight with driver (and even more with 3-4 passengers) and horsepower level. They were super fast with delivery. Currently installed and works great. Thanks everyone for the advice.