Cadillac Repair: 91 seville 4.9 stumble, electrical schematics, cam sensor

Question
i have a 91 seville with a e041 current code ro33 history runs lean on front bank  cyl 1357. checked to see if motor was firing on tdc, distributor was replaced shaft worn. new cam sensor and ign module came in distributor. set base timing w/dlc jumper 10 btdc. still stumbles eo41 keeps returning. hard to see timing mark when dlc not jumped at idle, timing fluctuates making it hard to time. what am i missing?   any help would be greatly appreciated.

thanks,   Stumbling in MA

Answer
You will need, If necessary, Electrical schematics and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture.  I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.