97 suburban 2500 drivetrain + my truck

[spaseghost]

97 suburban 2500 - 454 cid, 10k on a new gm 4l80e. work is gonna auction it off cause it need $2500 in brakes and suspension. the engine has 189k interstate ticks, i put 40k on it myself. it runs like a champ and the tranny is tank. i wanna put it in my truck (454 & th400), and keep everything else how it is. gauges, bench seats, power windows, all that. i want my 85 with a fuelie big block and heavy duty auto over drive. i know i can bolt it in, but what about integration with the factory gauges and all the obd II stuff, is there a bcm linked too it? do i just have to do some pin outs, i want to know before i spend the $1500 on this damn burban. i really hope i can do this and keep my truck stock, except for the drive train...