Here's my 2 cents worth. I have 6al that I have used on different cars and it works great. I've have experience w/ MSD and Accel both are fine units. I know when you go from points to electronic the way the car starts and runs is so much better,which I'm sure you know already. I believe it comes down to which brand you like better and what you want for looks also how much you want to spend. I don't know or remember which dist. you have, but if you were going to replace all, MSDs' has units that all will plug together.