I apologize if this topic has come up before, but I am fairly new to this board, so I am not up to date on the topics that have been covered. I've got a '90 Blazer with the 350 tbi that is still running quite well after 130k on the engine. One of these days I would like to upgrade the motor, perhaps with one of Scoggin Dickey's performance TBI's or something like that. I am worried about the stock 10 bolts (Bad idea to begin with - JMO). If I upgrade the horsepower and torque, even slightly, I am worried if the stock axles will handle it. I realize there are 12 bolts that can be swapped in, 14 bolt ff's, etc., but I'm not looking to build a super duty vehicle. This is my hunting/camping vehicle and 1/2 time daily driver. It will never see 35" tires, or a 502 Rat, etc., etc. It's currently wearing 32" BFG's with no lift, and will not likely go up from there....maybe a 2 1/2" lift with 33X12.50's some time in the future...at the very most. I'm just looking for upgrading what I already have. For example, you can upgrade the AMC model 20 with a Warn full floater kit and one piece axles. This is the type of thing I was thinking of. Is there such a thing out there for what I've got, or is swapping in a 12 or 14 bolt easier/cheaper? I am open to suggestions. Thanks for any help you folks may be able to provide!