Hey Lance,
Yep, TB=Throttle Bodies. I believe stock for the Gen I is 58mm and Gen II is 62mm. I have a set of stockers that were opened up to 62 to go along with the rockers. There are some who can do the port and polish on your stocker, but if they get too big, drivability becomes a concern. Most do not like the Crowers because they have a tendancy to shift off of the valve(not on a shaft). I plan to go with the Arrows($650 through BTR and Arrow racing). Most like the TD's, but I can't afford the $1800 cost.
Mike