Official NBS 4.3v6 to GEN 3 V8 swap Guide

[Customtruckbuilder]

Has anyone used, or can confirm that these fittings will work for the fuel. I don't want to cut off my fuel lines.
https://m.summitracing.com/parts/rus-640820
https://m.summitracing.com/parts/ear...ENwxoCrn7w_wcB

[Jtburpo]

I have been researching swapping my 2007 classic 4.3 out for a 5.3. It is currently a DBC system. I haven't found clear answers for the correct engine and wiring harness. What is the correct year engine and wiring harness I should buy?

[JoeNova]

I'm a little confused on the mounts.

I pulled a 5.3 and grabbed both the engine mounts and frame mounts from the donor.
The passenger side looks like it will fit fine, but the driver's side isn't even close. Is it possible that the 4x4 frame mount is different on the driver's side of the 5.3 donor? I grabbed another mount from a 4x4 Yukon for the driver's side but it looks almost exactly the same.

Does the driver's side frame mount need to be from a 2 wheel drive truck? I'm doing the 4.3 to 5.3 swap into a 99 or 2000 RCSB 2wd Sierra (can't remember the year right off hand) that has rack and pinion steering.

[zebra]

I'm a little confused on the mounts.

I pulled a 5.3 and grabbed both the engine mounts and frame mounts from the donor.
The passenger side looks like it will fit fine, but the driver's side isn't even close. Is it possible that the 4x4 frame mount is different on the driver's side of the 5.3 donor? I grabbed another mount from a 4x4 Yukon for the driver's side but it looks almost exactly the same.

Does the driver's side frame mount need to be from a 2 wheel drive truck? I'm doing the 4.3 to 5.3 swap into a 99 or 2000 RCSB 2wd Sierra (can't remember the year right off hand) that has rack and pinion steering.

yeah, 2WD and 4WD frame mounts are different. gotta grab ones from a like platform.

[Lsjuan5]

I did a v6 to 5.3 swap with my stock 5 speed trans.
Anyone done the same?

[RWilliams]

I did a v6 to 5.3 swap with my stock 5 speed trans.
Anyone done the same?

I’m just about to start this swap in my 2001 2wd gmc rcsb. But I’m having trouble sorting thru the information on mating the transmission to the new 5.3. What did you have to change to mate them? Do I need a 4.8 wheel? Do I need new hardware? Do I need a new throw out? It’s a shame if I gotta change a bunch of stuff cause I just installed a new clutch kit. It’s got like 1000 klms on it. But the engine is toast.
Thanks for any input!