purple cam question

I run the early 108 version and advanced 4 degrees in my 383. With at least 3.91 or higher gears and a decent convertor it is fine!

I have had it since 86 but with 4.56 gears with a 9" convertor. Got my car in mid 7's on the 1/8 with cast iron and full exhaust with pro-trac street tires.

Now that I have 3.55 gears I would like to downgrade it to the 284 or a more modern grind.

Pretty spot on. I had the .509 and eventually swapped it to the MPP 284/.528 cam and was MUCH happier, so was the car. But the .509 cam worked and sounded decent. The 284 solid cam just outperformed it all the way around and is more street friendly.