My truck has a 100% stock front end besides radials. It is tight and alignment is good. No overdrive at the moment because I didn’t swap my old 3 speed with borg warner electric overdrive in yet. Truck will still drive 65-70 on the highway with absolutely no issues. Can have one finger on the wheel and just cruise. The 327 is a good motor but once you go to a newer LS style engine nobody goes back unless they are bored and just want something to work on. My 5.3 has all factory gaskets, sensors, switches and accessories. Not a drip or drop under it (besides steering box hahaha) It still has original spark plugs and wires with 140+ k on them. Runs like a top and last time i checked it via GPS it got 17.5mpg on backroads when it still had 4.56 gears in it. I have not checked it yet with the 4.10’s.