1972 Dodge Colt

You can also use an ignition interrupt during shifting to unload the transmission just long enough to shift. A button on the shifter is the most common way of implementing that. I have seen a pneumatic solenoid used for clutch actuation before operated from a shifter trigger, too. I think “no lift power shifting” is still the best plan of action if you’re limited to a stock type transmission. First and foremost, get your rear suspension tuned in to the best of your abilities first.