Installed a Skip White Performance 475HP/383 in my 1984 Monte Carlo SS in spring of 2019. It is beautiful with a polished CVF front drive and lots of go-fast parts. My wife and I made the overnight trip to tour the shop before making the purchase. The car is a blast and the motor still delivers tons of smiles. I would agree that they can be a little difficult to get ahold of but the products are worth it. I am a super happy customer: https://www.youtube.com/watch?v=duDfI8oM7KM