Hi limebluie,
Here's a place to start.
Crane Cams failure tech page
Note the "Click for closeup" places - see if one of them matches the appearance of your dead cam & lifters.
Sorry it isn't more specific. Let us know if it helps any
Regards,
Tom
PS: I've had cam failure too so I know what's involved - mine was a defective Ford crate motor distributor that ate the gear off the cam...
PPS: Also, as to the lifter bore angle, the site says "or the angle of the lifter bore is not 90 degrees to the centerline of the cam" - the inference is that 90 degrees is the correct angle.