if I were you, since you said you are going to a B series, upgrade your suspension, and make the car lighter, since you will be installing a larger engine, it doesent weigh much more, but you can cut some body fat from del sols, I helped a friend make his as light as possible, he was puting a H22 under his hood, so he also had to beef up the front suspension..
This is what we did to his:
Upgraded to Poly bushings, upgrade steering components to aircraft aluminum, carbon fiber hood( or fiberglass), fiberglass front Z fenders, 15" racing wheels (with good tires), Invest in some good performance shocks and Teins.
He also got larger front rotors/calipers, and larger rear rotors and calipers.