Im using the 5.7l obs fuse block. I removed ac though. Some things will need to be repinned and wire the pink injector wires will need to be brought to a common ignition source. I just used 2 sources on the fuse block. Repinning the fuel pump is easy. Not sure how similar the 4.3l uhfb is to the 5.7l uhfb, but if its close i could try and help you out
Last edited by shmiet; 07-29-2013 at 02:06 AM.
Back Alley Motorsports 98 GMC
-5.3l LM7 bored to 5.7l Thompson Motorsports -72mm T4 Magnum Turbo
-TU1 Custom Grind cam(spec speed.inc) -799 heads
-.660" Trick Flow dual valve springs -Forged Probe Pistons 3.902" flat top
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