I have a '79 K5 Blazer with a I6-250 and a 4-speed manual. I threw a rod and broke the block. I have a 454 I was building up but wasn't expecting to have to put it in this soon. What am I going to need to change to put it in? Bell housing? Mounts? I have a new radiator for it by the way, six core I think. I also have a new ceneter force clutch and flywheel (are there different flywheels for the different BBCs?). I plan to do the work this weekend, and I'm wondering what all I need to get/modify/do to make the changeover smooth.