If you're setting the car up for drag racing then spend a few minutes to work thru the calculations so you pick the correct rear gear. Even with the EZ heads the torque peak won't be very high, so you don't need steep gears. 3.90 might work or maybe 4.10. You need to run the numbers to figure it out.

The heads need to be looked at by someone before running them. Not sure if you got the heads direct or if Todd went thru them.