Whats the Best B-series All motor build for my DD

[Sushi]

your best bet?

yank out the GSR and build an H22.

:P

x2 If you want good MPG then get an H22 Complete Changeover and swap that into your car. Which you didnt mention what it is. It will give you plenty of torque and will give you more MPG because it takes less power to pull your chassis whatever it might be. No replacement for displacement.