LR4/4l60e in 87

[bloodybigblock]

I plan on taking the outdated 305 in my 1987. I plan on using dingo mounts. My main questions are:
What fuel pump should I use since I do have the 87 tanks?
Will I run into any problems running the OD with my gears being 3.08 on a 27" tall tire? I calculated it at 1878rpm running 70mph. Which I'll be mostly driving 55-60 when I actually drive it.

Also any part numbers would be great, especially on the fuel lines and parts. I'm not looking into building a performer, just a reliable truck that can take me anywhere and get decent fuel doing it!