Recommending cams is very controversial at least.
There have been several threads on that subject here on this forum.
The most scientific is to let someone like Dan Jones recommend a cam based upon the specific criteria of your engine. The reason I say that is he has a pretty good computer program that really narrows down the needs and can dial in on a cam really accurately.
How an engine runs with specific camshafts is also really a matter of taste. Some want it to be quiet like a Lincoln and some accept the rump, rump idle that makes it sound like a 5.7 liter Harley Davidson?
What exactly is wrong with the camshaft that you have in there now? I would think if it is running alright now, leave it alone.
Doing a camshaft change in a Pantera is not fun.
You really need to take off the rear deck for engine access, and the bulkhead cover as well.
There is a lot to consider and you may be gaining very little for the effort required?
The 3v CHI heads are going to have more specific cam requirements of which I am not familar with.
Why don't you give the Byer's Brothers down at Precision Proformance a call and see if they have any info on the cam that they sold for you car?
That's where to really start.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.