A bigger TB definitely does put you into the A/F tuning area...it may not be required, but you won't see the full effect without tuning. The S-AFC seems to be your best bet if you go this route. I would look at the Pro-Flow 75mm MAF, it bolts right up and works very well with no tuning at all.

[[Justin]]
'98 Silver Frost SVT
#2089/6535
I am made of cheese
My car is in the shop
When I drop the clutch, I get wheel hop
Do not eat me, oh please