We have a 84 square body chevy wanting to pull existg. 98 vortec 350 out and drop 06 4.8 vortec injected in. We have a nice donor truck complete which is running and has 58000 miles, tranny, wiring, package. We are just wanting to get away from old carb, stink, adjusting, etc. And new update clean look, and hopefully better mileage. Any advice out there on some of the issues of this swap??