well it shouldn't be that hard doing that engine swap by the way you're making a good choice... crossfire does stink. anyway... are you planning on doing any performance mods to the LT1? if so your best bet for parts is summit, Jegs, or Edlebrock. and if you don't have the engine yet... try Jasper Engines they're good! now as for puttin' it in. i'm pretty sure you can use the same mounts. now for the transmission, i don't think (now i could be wrong) you can use the same trans you got. unless you're going for high horsepower a 4L60E trans is good for cruisin' if you are going for performance you can try a 700-R4 or a 200-4R those all have Over drive which means you can put a tall gear in like a 4:11 and still drive it on the freeway and keep decent gas milage. You can check Jasper they'll answer any questions you got http://www.jasperengines.com or Jegs www.jegs.com if you have any questions for me let me know i'm always here to help!