Classic/Antique Car Repair: 57 chevy 327, pvc valve, chevy 327

Question
brad sent you a question befor with the knocking in the motor changed the oil smelled of carbon and gas changed the plugs gapedc at 35 have msd distibutor donot know what the advance is in the dist timming is set at 10 btc the edelbrock 600 cfm carb the mixture srewws set at 3 qauter turns out from seat the vacume it at 20 pounds on the gage thats the highest i could get it the idle is at 700 the car runs good but when acelerating it seems i here a lot of air crueses ok temp is 160 themostate goes to 165 in town then shut it off the temp goes to 195 and i here bubbling in the to hose and the over fill tume i just put in stares the fill and i see litte bubbles ov air in it restart the temp goes down to 165 so i think the water pump is working and the themostate diving steady without stopping it runs 160 have electic fan because no clearance with this motor are the mixture screws set to lean or should i go up on timming i think this oil go fould from a cloged pvc valve and idling to rich before the screws were out 2 and  half turns i think i had carbon build up in the pistons and maybe the oil got deluted from every one playing with this carb oil doesnot smell of gas and useing 93 octane how can i get the motor to run cooler so the oil cooles when you start back up after a hour or so the pressure goes to 20 at idle no knocking just want to try to keep it ok can you tell me if the timming is right and the car adjustment thank you   louie

Answer
Ok, you have a bunch of modification and that makes it a bit more difficult to get to the problem. First of all you are running the engine too cold. You have not said but I will assume unless you tell me differently that you are running a later model 350 engine. If so this engine was designed to run at 195. In fact I just finished a 49 Chevrolet for a customer with he original 6 cylinder in it. I have a 195 thermostat in it and an electric fan. It runs great. Ok, it is normal for an engine to increase temperature immediately after shut down. This is called heat soak and occurs because the coolant has stopped circulating in the engine. As far as the carburetor adjustment goes you want to turn the screws, one at a time, until the engine loosed revs and starts to run rough. Then back the screw out till the engine reaches it highest RPM and starts to drop off. Then turn the screw back in till you are back to peak RPM. Then do the other screw and reset the idle speed to the idle RPM that you want. For the timing, if you have set it with the vacuum hose to the distributor disconnected sound about right.