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95 S_Trucker · 03-19-2014, 01:30 PM

You will need to swap the oil cooler outlet at the block. The 2wd had the filter going straight down. The 4wd has the filter behind the bumper. If you don't switch it, the oil filter will hit the front diff.

I' showing 2 different part numbers for the oil pan. I didn't think there was a difference. But if you are replacing the gasket anyway, its no big deal to swap oil pans. If you do swap pans, make sure the oil pick up is at the same place.

03-19-2014, 01:30 PM	#7
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,179	Re: Things to do before installing 4.3l in 97 blazer You will need to swap the oil cooler outlet at the block. The 2wd had the filter going straight down. The 4wd has the filter behind the bumper. If you don't switch it, the oil filter will hit the front diff. I' showing 2 different part numbers for the oil pan. I didn't think there was a difference. But if you are replacing the gasket anyway, its no big deal to swap oil pans. If you do swap pans, make sure the oil pick up is at the same place.