Mach1,
Longtubes make a lot more torque than shorty headers. The longer tubes help scavenging at low RPM's so that's why you get the RPM's faster. There have been guys who have dynoed both and the longtubes always come out way ahead in torque and slightly higher in HP. Shorty headers are made for convenience of fit and not performance. If shorties worked just as well then you'd see all the guys in NASCAR running them. Obviously their motors are pretty rowdy but the longtubes still provide a significant difference on a stock 5.0. I'll post my track times once I get mine installed.
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3.55 gears, short shifter, BBK headers, Mac Pro Chamber, Mac Cat Back, C&L mass air, Nitto DR's, Nitrous Works nitrous 50-175
Best ET's:
14.14 @ 98 NA
13.46 @ 104 80 shot
with a worn traction lok and 60's in the 2.12-2.2 range.
Up next: Longtubes, short belt and a new differential
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