11 Second Club - small cam and a few bolt ons = 11's

I posted this in the canadian section but figured since I am applying for the 11's club I'd post my stuff in here.
Car is a '76 Datsun 280z with an '00 LS1 and T56
Stock bottom end still with a 224/224 cam, FAST 90/90 combo as well as hugger headers and 3" single exhaust. Tires are Mickey Thompson ET Street Drag Radials - 18psi. Drove to the track on the tires, dropped pressure, ran, filled them up and drove home. :)

First run of the night last night:
.1952 RT
1.7799 60'
7.6768 1/8th
94.72 MPH
11.7738 1/4
119.98 MPH

last run of the night
.0070 RT (wowzers!)
1.8740 60'
7.7627 1/8th
95.62 MPH
11.8288 1/4
120.97 MPH

I also had a 11.84, 11.86 and 11.87 that night all traps between the two posted above. :)

I love that swap. Some pretty decent times and mph. How much does it weigh?

why fill the tires back up...i run 20psi on the street and 20psi at the track...seems to give the best wear pattern