I have a fairly good condition 4G52 in my 73 Galant GTO which i am looking at doing some work on. As far as I am aware it is the original engine which was the one before the Astron 80. The previous owner had done some work to the engine such as oversized pistons, lightened flywheel, balanced crank, ground cams, and extractors. I am looking at keeping this car fairly original so do not want to put a later model engine in (even though it would be the smartest idea) but want to get some reasonable power from this engine.
Just wondering if anyone has any ideas where i can begin on an engine like this. I have been considering replacing the twin down draft carbs with a pair of side drafts... good start? Only thing is i know roughly how much parts will cost it is just the tuning of the carbs i have no idea about. So any information on increasing performance or the process of slamin twin side drafts on this engine would be much appreciated.
Also if anyone knows anywhere i can source new/used/performance parts for this engine could you please let me know. After hours of web searching very little turns up.