4.3 swap questions

I've got an 03 chevy full size with the 4.3 in it. I want to put the 4.3 in my 87 s10 that has the 2.5 4 cylinder in it. Anybody have any tips on this? What else would I be looking at besides motor mounts, tranny mount.

the stock exhuast manifolds may be different just because the donor came from a fullsize but other than that its pretty simple