going fast help

DusterBoy15, low 13s are not as simple to achieve as you think. You can read about a simple combo Hot Rod magazine put together to make their 318 turn 400 horses, but it's not that easy in real life. I've got a '74 Dart 318 with a Clevite camshaft (exact same specs as Edelbrock's Performer 383/400/440 camshaft), an Edelbrock Performer dual-plane intake and 600 cfm carburetor, and 1 5/8" headers with about 1 foot of 2 1/4" pipe and a flowmaster on each side. I'm also running a 904 trans with a Hughes 2500 stall and Hughes frictions, steels and bands. The valve body is slightly modified to give more apply pressure to the clutches and bands for firmer shifts. The rear axle i'm using is an 8 1/4" with 3.21 gears, turning BFG 235/60-15 tires. It's got MP leaf springs and Monroe shocks, as well as a set of traction bars. The car weighs 3220 lbs w/o a driver. The best time i've turned here in Phoenix, AZ at 1320 ft altitude with great traction off the line was 15.236 @ 87.84 mph. Given that's with a stock bottom end and stock heads on a 120,000 mile motor, but the motor has sufficient compression (8.3 - even across all cylinders) and runs well.
As Moper said, most people can't drive worth a damn.
I've been able to run 350Zs and new G35s down easily on the road, even a Saturn Ion Redline pushing 18 lbs of boost through the blower. Late '90s Camaro Z28s with LS1s can easily run high 13s with a good driver. Low 13s in the 1/4 is optimistic for Mopar young guns like ourselves. Once you start going to the track, you'll see. You'll go knowing your car is fast and that you've beaten 14 second cars on the street and expect at least a 14.5 and then you'll drive by the time shack excited to read the numbers only to find that you ran a 16.5. That's the way it works in real life when you're building a bolt-on street car. Now, if you're starting with a 318 block and putting race heads on and KB hypereutechtic (sp? lol) pistons and 1 7/8" headers and a .500" lift cam and an Eddy rpm air-gap intake and dominator 1050 cfm carb etc with a TCI 727 3500 stall, 4.56 gears and slicks, then sure you'll run 13s or faster if you don't crash first. But that car and reliable street driver don't mix. Especially if you have to take emissions testing and want good gas mileage. Put a modest (650 cfm) carb on, use 1.88" and 1.60" exhaust valves in 318 swirl-port heads (if you're not using stock heads), a .450" lift cam with no more than .220" duration @ .050 lift, 1 5/8" street headers, 9:1 compression, stock Mopar electronic ignition, a 904 or 727 trans with a 2500 stall max, 3.21 gears and street tires, and enjoy 14s. My car runs low 15s and is very fast for a street car. It'll do 0-60 in about 6.5 seconds. It puts you to the seat and barks the tires into 2nd half the time. The Camaros and Mustangs and 350zs etc will run their 13s and 14s with pro drivers, close-ratio manual transmissions and slicks, in ideal conditions. My automatic Dart will run a consistent low 15 whether it's 65 degrees or 105 degrees outside, whether i'm driving or my girlfriend is driving, whether the wind is against me or not, it doesn't matter. That's REAL performance and that's what you'll be happy with in a street car.