All the same mods as any other engine. More compression, more flow, more carburetor, more exhaust......BUT the one place you really have to be careful with the slant is the camshaft. They are really easy to overcam since they lack cubic inches. Did you follow the link that was posted to my cylinder head thread? I plan to run an 800 Thermoquad on mine. But then thermoquads are kinda an out side the box carburetor.
