msd 6530 6al2 programmable digital

[SD455]

Anyone have any experience with this programmable MSD? I bought one,and am now having second thoughts. I have a 10 year old Crane HI6 that works fine,but I need to limit total timing now to 30degrees,and want 16-18 initial. Just doesnt work with the current HEI,so I thought the programmable box would allow me to dial in exactly what I want with a 10degree start retard which is a nice option.



The downside is no vacuum advance,and this is a primarily street driven car.

Am I on the right track,or should I send my distributor off and have it set up for the combo and leave it alone?

Comments and suggestions welcome.

Thanks