Looking for some advice on rebuild options for a '73-1/2 2.4 CIS engine. The car has been cosmetically changed to look more like a 74+ 911 so I'm not concerned with staying OEM with the engine, I'd just like more performance than the 140 HP the 2.4 CIS delivers. The engine options in "How to Rebuild and Modify your Porsche 911 Engine" don't address modifications to the 2.4 CIS engine and from what else I read, PMO carburetors and aftermarket Fuel Injection kits (ie- megasquirt) don't exist either for the 2.4 CIS. Any recommendations or personal experiences with 2.4 CIS modifications would be appreciated.....