No... just because you are gaining two inches of lift in the fenderwell or crossmember to ground does not mean you need two inches worth of shock spacers.
Determining the length and stroke of shock needed depends on where the shock is placed on the control arm.
How much spacer you need is like shock length determined by where the shock is placed on the lower A arm in relation to its pivot point versus the amount lifted.
If the shock was right out near the tire you would need close to 2" of spacer for just over 2" of ride height gained. Being that the shock is almost halfway between the pivot point and the wheel end... You should technically need half of the ride height gained in shock spacer thickness. Which is almost what i've just installed in spacers.
As for the IFS offroad comment? I am not a rock crawler. No ifs guy should be.
But for sheer ground to under truck clearance... A solid axle truck will not match an IFS truck. If you have 30" tires on your solid axle truck. You technically have 15" to your lowest point where a rock can hit. If you lift that truck by 12"... You still have 15" of clearance. If you have 40" tires on that solid axle truck, you've still only got 20" of clearance to the axle housing.. Maybe less depending on the size of the pumpkin. Whereas with an IFS truck; the larger the lift and the larger the tire the more clearance i gain to my lowest point. its not rocket science.
One downfall of a torsion bar ranger I will admit is suspension travel. Not much can be done about that. As for strength and reliability... If you need greater strength than what a torsion lifted ranger on 33"s can provide... You need to buy an all around burlier truck!
IFS rangers are not boggers and not crawlers. They are great outdoorsmen vehicles that can be daily driven comfortably without breaking the bank in any manner.
Now if you have a problem with my shock spacers.. Stay out of this thread.
I think Ive stated my claims fairly, and proven my theories with technical knowledge.