A well ported LS head Only amounts up to what a STOCK VTEC head will flow ..

The LS crank has the extra stroke which will allow the car to make more torque than the GSR crank ..

The GSR crank is a better choice for High RPM operation because it has more filleting done and balanced a bit better ..

A well built LS/VTEC will make good power and be plenty reliable . I suggest the use of ARP rod bolts if using stock rods ..

If you do end up using a straight LS , You can use the PR3 B16 pistons in the LS block