I'm on the verge of an engine rebuild of an E12 1977 530i and want to know how much is gained over my stock 3.0L by rebuilding my M30 block as a 3.3L or 3.5L. I know what needs to be done from an E12 forum, but I don't have any engine specs. for E28s. My blue book tells me I have 175 HP at 5500 RPM and a max. torque of 188 ft. lbs. at 4500 RPM for my 77 530i. I don't have any E28 reference manuals (yet), so I was wondering if anyone could tell me how much power and max. torque I can achieve with the 3.3 L or 3.5 L M30 engines. Thanks...