Own '72 LeMans for two summers now. Recently found out it's not the original 350 motor. So now I don't know where to start and where to end. When I 1st got it home I changed the points, plugs, fuel filter and oil. Purchased but haven't installed a few upgrades. HEI distributor & front disc conversion. I'm 62 so most of the time I drive the car easy not only because it doesn't stop but because I'm in no rush. But when I hit it the car bogs & sometimes backfires. So first thought change the 4bbl bogchester to EFI. 2nd thought, back to the Basics. Cleaned and checked points plugs cap wires carb & set the timing. Car ran goooood but only for a short time. Timing was Out again. Found 12 degrees of slack in the Timing Chain. Now I added a timing chain set and water pump to my uninstalled purchases. Back the Question. Where to start and where to end. Just do the TC? Cam and Lifters? Heads? SD exhaust? Find a 400 or 455 to rebuild? Or go for broke with a LS motor, ideally out of a GTO or G8? Childhood friends advise from, just do the chain to a Stoker. I want the car to be reliable and go when I hit it. Do I don't need 400HP? No but then why is there a 707HP Hellcat? What would you do? Thanks in advance.
