Oh yeah, all 2009-later 5.7L heads flow 310 cfm on the intakes BONE stock; the ports are almost 2" square and the intake valves are 2.05" IIRC.
The expense is going down rapidly was my point, I got a whole 2014 5.7L for $600 with 134k miles because it ate a lifter and cam lobe. A few years ago it was $1800+ to swap a G3 in a classic, now it's more like $1200 and still getting cheaper.
