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yes the 4.3 set up bolted right up. if you do the same swap make sure you use the reverse flow waterpump. i used the one off the 4.3. i used the air conditioner compressor and the alternator and power steering pump
I am doing the same swap on a 1990 silverado 1/2 ton , you said your engine set to the left a couple inches...how did that work out? Is the upper steel brackets on the 4.3 the same as 5.7? I was wondering also if anyone knows what years these upper steel brackets that bolt to the block will interchange? Im needing to go to the wrecking yard and pick up a pair for the swap.