I did go with the TTI shorties. Perfect if you're running in stock location with a 5.7 intake, no low mount AC compressor and using TTI mounts.. I did not follow that pattern tho. I'm running 6.4 with 6.4 intake, low mount compressor and Schumacher /6 K mounts. So, I had some battles. But yes, the motor is in and out with headers on.. I've had it in and out at least a dozen times. And yes, you will need a Borgeson box..
Build Thread here. Plenty of pics and info
Things Change.. Butters is now getting a 392