5.7/392 stroker Lots of good quality stroker kits available I would do a old 2003 to 2009 block to stay away from the VVT cam with the 2010 up 5.7 eagle heads ported
I would do stock exhaust manifolds or the cheap stainless steel shorty headers for a LX car. You will have plenty of room with a Tube K and coilovers..... and a 88mm turbo
