Greetings All!! I recently obtained a bone stock 1990 Blazer. (350 TBI,700r4/np241 and 10 bolts) I want to add a 4" lift to it and some bigger tires,but have a few questions before doing this. I read alot of the tech. stuff and it talks about the drive line angles when lifting the truck. My question is...how much lift can you safely install before you need to start thinking about the drive line angles? Thanks for the info in advance.