I got a great deal on a brand new one from someone on eBay years ago. I was going to use it on my wife's 69 Mustang with a 351W but never happened. So it's been in a box for years. I'm giving thought to trying it. Ideally I'd prefer a 500 for my GT40P that has a 5.0 cam, Wieand Stealth and 600 Edelbrock which runs really well. Thoughts?