Is anyone running a 4.7L???
Got one in my 02 Dakota that runs like a scalded dog. No matter how hard I run it it never gets less than 16 mpg and if I take it easy 19-20 mpg isn't a problem. Never had 1 single problem with it, but I do change oil regularly and use synthetic and it only has 85,000 miles on it. That's not to say I'd use one in an A-body though. It's size is comparable to the 5.7 Hemi (much wider than a LA engine) so in my opinion if your going to go through all the work to install one why not go for the extra cubes and more power?
For those that mentioned they had a 4.7 and wished they would have gotten a 5.2, it's my understanding the 4.7 replaced the 5.2 so unless you would have bought an older truck you couldn't have gotten a 5.2...
Oh yeah, I had a 93 Dak, same exact configuration (std cab, short bed, auto with 3.55 gears) as my 02 but it had a 5.2 in it. Never ever got more than 15 mpg, even with my wife driving it running down hill. Ran liked a raped ape too but gas mileage sucked. Avg was generally about 12 mpg