It's an HEI type distributor. I put one in mine and am really satisfied with it. It's a one wire hook-up, 2 with a tach, that really cleans up the engine compartment because the coil is in the cap. I paid 350.00 2 years ago for it, a lot more costly than the Petronix, but I like it.
What is your concern with the pertronix? In terms of "drop in" to your current distributor, it is as easy as it gets. I have also used a Mallory Unilite in the past, the Pertronix has worked great for me.