Short answer - yes, but it's not that easy. First you'll have to add something like a pound of ballast either on or near the front. And then you'd have the privilege of running four of the same springs, not the same color springs, if....

Long answer - The spring itself doesn't mean jack, it's attached to a control arm and a shock tower, could have multiple positions, and you need to calculate the wheel rate and then calculate the spring frequency to have it mean anything. Yellow fronts have a stated rate of 4.8 Yellow rears are 3.1. AE's grading is consistent with each other, but if you do something like go to TLR springs, your on your own. I'm sidetracking myself, but I want to make clear there's nothing wrong with AE springs or their rating. The issue is the spring selection for this truck.

What is wrong is putting a spring that is 33% softer in the rear that has 55% of the weight on it without some way wacky motion ratios (that we don't have) to correct for it. If you want the spring frequencies equal, you'll need more wheel rate on the heavier end. This is why when Cameron is having success going from yellow rears to green fronts and then white fronts - he is improving the spring mismatch situation.

I have run yellow front springs on all four corners the past two race weekends. I would go stiffer in the rear but yellows the stiffest I could find. If you try fronts in the rear, you need to add another 2mm to the shock eyelet either in one of those clip on travel limiters or some other way.

Before anybody says "just cut the springs" save your breath. I've already thought of that, and I've done it before - it's a huge pain in the butt to rewind and regrind the pigtails. I'm thinking of another option.

I'm sure you can, but even if you could, it wouldn't be terribly useful. The chassis scales are a godsend, IMO.

Not at all.