engine swap

i have a crate 2.8 1986 motor with under 20,000 miles want to install it in a 91 Pontiac trans sport. will it fit and what do i have to do to make it work right i know transmission will bolt up and starter will bolt up. will the front (water pump and acc) change over? Just trying to keep my baby alive it has over 230,000 miles.

I found this
http://www.answers.com/Q/87_gm_2.8_v6_motor_swap_out_with_93_gm_3.4_v6