I've done the same swap...
A couple of comments:

1) Running 44044s up front - the truck doesn't sit level:
[Linked Image]

2) You'll need to modify the parking break to clear the springs a bit:
[Linked Image]

3) I'm running a soft-ride 1.5in add-a-leaf.. It's almost level. Long shackles in back are good, but they're not enough to correct your pinion angle, you'll need to shim.. I believe I used 3 deg shims.

Very flexible.. cheap springs.. ride great.. notice overall length increase - new mount point is in front of old spring:



That;s a CLEAN truck, i like it.

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim