can you wild card the alt. F4 team ability so, say, spider-man has a 19 defense? or can you thunderbolt it?

You may wild card the Alternate FF TA. You may *not* use Thunderbolts to acquire the Alternate FF TA.

From the Marvel FAQ:

When a character with a wildcard team ability uses the team ability of a Fantastic Four member with the Fantastic Four card, the wildcard character uses the new team ability instead of the original Fantastic Four team ability.

and from the Marvel FAQ:

Characters assigned the Thunderbolts feat may not choose a team ability that is granted by a feat card when choosing a team ability.

can i use both the feat card F4 and the feat card T-bolts to get what i want?

No. As I posted before, from the Marvel FAQ:

Characters assigned the Thunderbolts feat may not choose a team ability that is granted by a feat card when choosing a team ability.

The alternate FF TA comes from a Feat card. Thunderbolts can *never* use that TA.

If I used alt FF TA and a V Torch, could he use Spideys 17 instead of his 16 by wildcarding?

You betcha.

sweet