Hello Marco,
Bubba is right, I bought the HEI distributor but haven't installed it yet. And I won't be able to test it before spring...
What I can tell you is that the support and shipping was fast. You get a very detailed manual, it seems to me that the manual covers all necessary subjects, but again as I haven't run the distributor yet I cannot say if everything is covered by it.
On the outside, in my opinion the assembly looks exactly the same as the crt-distributor I got off ebay. I filed the gear on the crt to check if it is cast iron (which it is), and the progression ignition seems to have the same cast iron gear. If I remember correctly, he even states on the homepage that all his gears are guaranteed cast iron, not sure though...
And also interesting is the distributor clears my stock power steering pump, I thought I had to cut the bracket but luckily didn't have to.
That's all the information I can give, hope that is of any help.
Regards, Martin