Looking for feedback from people who have used Pertronix. I need an affordable rev limiter for an HEI. It will never turn over 5500 RPM. I am not interested in changing the distributor. This is a budget project. I'd like to limit it to 4800 for the time being but may up that to 5500 later. I am debating between the MSD soft touch and the Pertronix 600. I like the adjustability of the Pertronix without having to buy pills and it is less expensive over all. I'd really like to find a used one.