My truck came with a Marine 5.7L with Forged Pistons and the GM performance Crank.
I used the EDL-7116 dual plane intake, a 1" tall Chaos split 2" diameter holes' TBI adapter (and the stock 5.7L TBI, for now). The adaptor allows for the upgraded larger bored TBI and a tune/chip or the Holley Sniper, later.
I have read good things about the Blue Print Heads and the aftermarket aluminum heads they sell. However, you should be aware the GM Performance Vortec Heads are much more advanced than aftermarket heads. Nobody is allowed to match the intake design of the GM Vortec heads, unless you pay an aftermarket race head machinists to build you custom heads. The GM Vortec's are in a class of their own. Especially the newer versions, which are thicker castings and better quality than the OEM versions from 1994. The intake runner is custom casting, not used by any other aftermarket head company selling "Vortec Style" heads. They call the bolt pattern "vortec", not the casting runners...
Before you make your decision, call these guys:
JASPER provides remanufactured gas engines, diesel engines, marine engines, transmissions and more for your car, truck or boat.
www.jasperengines.com
The marine version has brass freeze plugs. If you get the forged pistons and add on the GM Cast Iron performance crank and actual GM Performance Vortec heads, you might be better off in the long run. My Marine Jasper Engine did not come with heads, it was a short block.
The GM Performance engines from Mex have had customer complaints. Too many for my nerves.
Somebody WAS sending out poor quality control engines... unless this has been rectified, it bothers me greatly. I have read comments from world class custom car builders saying six or seven in a row bad. (This is not good).
At the end of it all it's the man or woman who machines and the quality of the parts.
My heads are NOT GM Performance Vortec, they are sub standard copies. They flow OK, but are not the real deal. Blue Print seems to make good stuff. Ask them if they will install GM Performance Vortec heads?
From my personal experience, Jasper makes good stuff too. Call them and get a quote for the best engine you can afford with the exact parts you want. Package deals are not usually the best option, from any vendor. Small customization, can lead to a much more reliable engine because it gets built by a different team in the factory.