87 350 transplant issues?

[AirSpeed]

I have an 87 K5 Blazer that I haven't driven in years, I start it up once in awhile to lube and charge the battery but that's about it. I'm thinking of pulling the drivetrain out and saving it for either my 69 C-10 or my 72 GMC 4X4. Will I have any problems with motor mounts? Is an 87 block different than a pre 73 block? Will an 87 350 bolt up to my 72 TH350?
The Blazer Is fuel injected, will I have to transplant any sensors along with the computer? What about the front and rear axles, could I use them in my 72 without much modification? Thanks for any info or suggestions.
I hate to part out a perfectly good Blazer but it would be nice to have an extra engine. It would cost a lot more to buy another engine or tranny than the $2000 I could get if I sold it and I know these parts are in great condition because I put every mile on them.
Thanks for any info!
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