Whichever you use, whether Dirty Dingo or engine plates, they need to be the 1" set back type for the Old Body Style truck(OBS). I ordered standard plates for my '93 and it placed the engine 1" forward of where it should have been. That's why I'm inclined to say that you need the 1" setback plates so you don't have any driveshaft/crossmember issues.
I used plates so I could use the original "clamshell" mounts from original 5.7 engine. Some plates have fitment issues that need to be addressed. Since I ordered the wrong ones, I didn't have any fitment issues. The 1" setback plates may cause fitment issues but are easily remedied with a 4" high speed grinder.
'93 Chevy 1500 4X4 ECLB with a '99 Silverado LQ4 6.0 and '99 Escalade 4L60E. SOLD IT!!
New toy: 2001 2500 HD 4X4 Extended Cab Long Bed
John