The egv valve needs to be fully closed at idle or it won't -it will be ok going down the road with maybe a surge,A worn cam lobe would have a pop corn sound on accel thru the air filter and may be a pop out the exhaust. You need to get a fuel pressure gauge and adapter to remove the filter and check there.spec is 10-13psi. Look at the injector spray pattern,they should both look the same-use a timing light to stobe it.The timing should be retarted with the set timing connector disconnected and run in base timing.You didn't check the timing before you moved the distributor ,it would have told you if it jumped a tooth-which is very possible,The distributors like to develpe problems that even engineering can't explain-if you have access to another one drop it in.Stll need to know codes if any-clear them first and then let them reset so we get only the current ones.A word of caution-that year like to crack blocks at the lifter valley because of the metal they removed to make room for the roller lifters in the cars.