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Old 02-24-2021, 10:42 PM   #7
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: L31 engine swap questions

4 bolt main blocks came drilled out for mechanical fuel pumps on most 4 bolt blocks well into the l31 engine run

You will need to check if cam has a fuel pump lobe on it and run a roller cam fuel pump rod the older style fuel pump rods and roller cams do not mix

They make ac delete plates to replace ac compressor with a idler pull
Nice engine I like the serpentine setup more then the old vbelts
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