running out of breath in the 1/4 mile

Running out of fuel. Start at the tank and work your way forward. /6 used 1/4" fuel line. v-8 used 5/16" fuel line. Hemi's used 3/8" line All had matching pick-up's in tank. I would start by replacing the pickup and line to 3/8". 1/2" would be even better. All the way to the carb. Install a fuel pressure regulator and guage as close to the carb as possible. You also need a tach to determine your rpm @ the 1/8th and 1/4. A 408 may need more fuel. After that perform a jet loop. Keep going richer until the car slows down then go back one size. You have some tuning work to do, good luck