.484 purple shaft grind info.

Cam company's have listed for each cam they sell on what it needs as far as ,compression,rpm,stall speed,gear .vehicle weight and carb size.
This is a really good way to understand how cams of different durations work.

Cam dynamics can be very hard to understand and what it really boils down to is learning the basics.
I still consider myself a basic mechanic.
I only can draw from the limited experience that i have.
I have a good understanding of what works for cams for basic engines.
Talking with each other and giving advice is a great way to learn but sometimes we get off track and or over are heads.
Strokerscamp has some valid points that are being taken from a good source.(mopar performance publication)
This is also in my small block engine book.

I have David Vizard's book on how to build horse power and i also have the small block mopar book written by Larry Shepard.

They both talk about cams and how to select them.
Larry Sheppard talks about duration as a key to cam selection.
David vizards talks about overlap and the LSA as a key to cam selection.

They both talk about every other part of cam dynamics also, but each has his theory on cam selection and his theory on the subject.

If i could sit down with ether one of these guys for a cup of coffee i would buy all the coffee they could drink and then some.

All in all being different is just part of the fun of being a gear head.
Hell,bench racing is second nature to us.
I think this might even turn into a cam race.LOL