If that is a Champion plug the heat range is correct. If it's an NGK it's a bit cold. If it's autolite it's probably 1 range too warm.
If the pictures are accurate you have too much timing. With pump gas you want the timing line on the ground wire to be half way between the bend and the shell. If you are running race gas you want it just around the corner and if alcohol you want the line about half way around the bend.
As for the oil...if you used moly paste on the cam lobes for break in your oil will almost always turn black because that crap floats around and then settles out in weird places. Like I said it will turn the oil black right quick.
