The DRW axle housing may be a bit narrower than the SRW, but that's speculation. If it is, you can correct it with a spacer, but be careful about who's spacer you buy, you don't want to skimp on quality for something like that.
Getting the spacers off the front axle might be a challenge without the proper tools.
Also, the brake proportioning valve is likely different, sending more pressure to the rear than a SRW. You may find that the SRW conversion tends to lock the rear quicker in a panic stop.
2002 F-250 CCLB 4x4 XLT, 7.3, ZF-6 with Midwest Short-throw shifter, ESOF, 3.73 R&P, HPx line, FRx, Racor prefilter before pump.