I posted earlier this year after I had my 250 4.1 head machined and grinded. The engine was overheating and had no power. I suspected that the machine shop did something wrong but I found that they did everything correctly. However, the engine is now too loud. When idling the engine sounds ok but as soon as I start driving the engine is too loud. I did not install the exhaust flange metal ring that goes between the exhaust pipe and manifold. Could this be the problem? Also, the engine would not idle at all after the choke came off. I had to reverse the 2 carburetor screws just to get the engine to idle. I realize that the throttle plate is now open wider that it used to be but I can get a steady idle and steady timing and can drive the car. The engine lacks power which is really apparent when starting out from a dead stop and going up hills. Any ideas would be appreciated.
Thanks in advance