Motor Swap

Hey everyone,

I have a 4.3 L chev pick up truck, I recently lost the motor in her and was looking to drop another in her. I have a 4.3 L astro van that I was told was the same motor and the truck would work fine if I put the astro van motor in her. Looking for anyways thoughts, if it will work or if I have to change anything over, any info would help.

Thanks