What will my 68 Dart 408 run in 1/4 mile?

Get a wilwood kit for either 9 or 10 in drum, whichever you have.

Do you need to switch to 15's for a Wilwood kit? I saw Wheel Vintiques had the 15x3.5 steel dog dish rims for sale but they are like 208 bucks a piece!

How close is the tire to the well? You can space it back.

They don't grow as much as you think

I can't say for sure because I just finished painting the rims so the tires will be getting mounted in the next day or two but from preliminary measuring it looks like it'll be very close. If I were going to get a bias ply what kind are most people running in a 28x12.5R15 or something similar in size? This car will be 85% street driven and 15% track.