Magnums VS. Eddy's

These are things that have to be taken into consideration when choosing a cam
1. retainer to guide clearence
2.spring height
3.valve to piston clearence
4.Rpm's wanting to turn
5.weight of vehicle
6.gear ratio
7.converter type
8.tire size
9.amount of carburation
10.type of intake manifold
11.size of hedders
12.head flow and valve size
13.compression ratio
14.octane of fuel used