So I built a 408 a few years ago. Started out just looking for under 500HP. About half way through the build I got a little amped up and went farther. Ended up with Eddy Magnum heads, polished massaged & deep port matched to an airgap by Hughes, then bolted on 1 7/8 race headers by TTi with 3.5 collector, KB forged pistons (11.0:1) Big Howard's cam (Duration @ .050": 248I/254E, Lift: .578"I/.590"E, Lobe separation 108) MSD and a 850 Dominator. Put a 100 shot plate system too. Might be too much for my Eagle cast crank with Eagle I beams (whoops got them 1st).
Anyhow went to the strip & ran some mild 1/8 mile all motor passes while breaking it in. Car launches great on 28 inch slicks 4:10 gearset 3500 stall 904. Three passes net nearly identical traps: 60 ft = 1.5, 330 = 4.7, 1/8th = 7.4 @ 91MPH consistently. Ninety one... I was looking for more in the 100MPH range. Don't you agree?
Car is pulling like a freight train. No skips or hiccups, great smooth power up to 6000 RPM shifts. I just feel like the trap speed is showing a weakness... If I were to tune up something (other than the driver) for more top end charge what would you go for 1st?