Driver's side lean 1/4" front spacer vs. 1/2" rear shim or both?

Trying to address Tacoma lean plus some extra driver's side sag in the rear. measurements are as follows from hub to fender. everything stock.

passenger rear - 23 inches

driver rear - 21.5 inches

passenger front 21 inches

driver front - 20 inches

so I want it to not necessarily be perfect but pretty close to level, not the obvious driver's side bias I have right now. lifts and $1000 leaf upgrades are not on the table right now.

from my understanding the most popular solution is to use a 1/4" front spacer like this one from Toytec to add ~ 1/2 inch of lift to the front. This would bring my front level or almost level but I'm concerned that since I'm 1.5 inches off in the rear it won't be quite enough. I have also come across this 1/2" rear shim from Wheeler's. If this adds anywhere from 1/2 inch to 1 inch of lift I think in conjunction with the front spacer should sort me out. But what would this do to the driveline geometry? am I risking damage to the differential by adding the rear shim? any advice?

in an ideal world I would upgrade all the suspension components but just want a cheap fix for the next few years at least.

 

I have minimal suspension knowledge but having installed spacers on my 4R a couple times to fix my lean, I'd go for a 3/8" or 1/2" front top hat spacer to get you closer to even. Also, I noticed with the front driver spacer installed, the rear driver lean improved some. Not saying the front spacer will even out the 1.5" rear lean but it may reduce it some.

 

I have both installed on my rig to fix taco lean. 1/4" on the driver front and 1/2" shim on driver rear. I also swapped my leaf springs, because one was springier than the other. You shouldn't have any issues with a half inch rear shim.

Edit: I also replaced the cab mount bushings near the radiator some time ago. Worn body mounts can contribute to the lean.

 

Add 2 1/4” spacers to your drivers front. 28.00 at wulf suspension in anaheim ca. It will raise it about an inch. You will need new nuts because there is not alot of thread left on the strut after spacer install. The flange nuts have a gap in them.