1972 Dodge Colt

I wouldn't worry too much about front end travel at this point. Clutch tune is top of the list for improving stick shift 60', especially in the Colt's case with plenty of traction. With a 'tamer controlling the hit, 60' improvements will go hand-in-hand with launch rpm.

Here's a nice round number comparison of how raising launch rpm improves engine output...
...A flat torque curve 300ftlb engine is only making 257hp at launch if you dump the clutch at 4500rpm. If the clutch then draws the engine down to 3000rpm after launch, now that 300ftlb engine is only making 172hp as it starts its climb to the shift point.
...That 300ftlb engine improves to 370hp at launch (113hp improvement) if you dump the clutch at 6500rpm. If the clutch then draws the engine down to 4500rpm, that 300ftlb engine is now making 257hp (85hp improvement) as it starts its climb to the shift point.

More launch rpm not only increases the engine's average HP production during launch, but it also increases the amount of inertia energy available to improve the 60'. Inertia energy is basically power that gets produced before the clock starts ticking, which gets stored as rpm in the engine's rotating assy. That energy can then be drawn out after the clocks start running to improve your 60'. The amount of inertia energy available to help increases exponentially with launch rpm.

In a typical stick shift 355 sbc rotating assy with a 10.5" diaphragm clutch and 18lb flywheel, 1 unit of inertia is equal to about 4.9 ftlb applied over 1 second. 4.9ftlb/seconds might not seem like a lot, but over a tighter time frame, the numbers start to get interesting. For example, 10 units of energy could be expressed as 49 ftlbs applied over 1.0 seconds, or 98ftlbs applied over 0.50 seconds, or 196ftlbs applied over 0.25 seconds.

Here's a comparison of how launch rpm increases the amount of stored energy available...
...Say you launch at 4500 (20.25 units of inertia) and then draw the engine down to 3000 (9 units of inertia) with the clutch, 11.25 units of inertia would be used to assist the launch. Problem is, that 300ftlb engine is only producing 172hp after being draw down to 3000.
...If you launched at 6500 (42.25 units) and then drew the engine down to 4500 (20.25 units), now you are using 22 units of inertia to improve the 60'. Adding to that, the 300ftlb engine is now up to 257hp after being draw down to 4500.

Using the sbc example above to put a number on how much inertia energy can be worth...
...In the 4500rpm launch example above, 11.25 units of inertia assisting launch is equal to about 55ftlbs of assist for 1 second. If the clutch draws that energy out in half a second, the inertia torque added to the transmission's input shaft would double to 110ftlbs for half a second.
...In the 6500rpm launch example above, 42.25 units of inertia assisting launch is equal to about 207ftlbs of assist for 1 second. If the clutch were to draw that 2000rpm out in half a second, the inertia torque added to the transmission's input shaft would double to 414ftlbs for half a second. That 2000 more rpm produced a 3.76x increase over the 4500rpm launch number.

What the ClutchTamer does is allow you to adjust how fast the clutch draws inertia out of the engine. I look at inertia energy like a short duration hit of nitrous to help get the car moving. A fast intense inertia hit will draw the engine down where it makes less hp, where a slower inertia draw is less intense but allows the car to gain more ground speed before the clutch locks up which raises the engine's average hp output during launch.

Grant