Interest in Performance Parts for slants?

You might try emulating the Ford Mod motor three valve head. The bore is only slightly greater than the small bore of a slant six (3.552 for the Ford, 3.4 for the slant) and guys are commonly pushing the bore of the slant six out to 3.5. Running the exhaust on the right side of the engine frees up the left side for a barrel style F.I. intake and a non overheated starter. Not cooking the master cylinder with exhaust heat is a good idea too.