budget drag strip car build Q's

I'll give you the skinny on my buddy's low buck Duster.
340 -.030"
J heads unported
Victor intake.
12:1 compression
Crane roller cam.
Nothing exotic about this car. Race weight is close to 3400#.
4.56 posi with 30" slicks
Runs 11.9's all day long.
Shifts at 6800 rpm.
That is low buck. That is consistant. And no real maintainence.