2200 lb vega with small block, 600 HP ladder bar car, what front tire size and why? Thank you all

What class or classes are you racing?

2BKING

Always run the tallest front tire you can fit without interference or looking goofy.
I'd guess you're going to want a minimum 25", maybe 26", depending on your style of racing...
If you're pro tree racing, I'd say stay as short as possible, if you're bottom bulb racing, use what helps you find the .000 reaction times, if you're top bulb racing, it really doesn't matter.

Vega might be limited to what size you can run.

I have always ran 26 inch on my cars. Basically in the middle as far as diameter.

Moroso DS2's or M/T ET Fronts.