The port near the distributor is supposed to be a good spot for a sender and some will say better than the stock location. The deciding factor may be whether you can get that plug out. If you can, you can use a tee and put both senders there. I'd suggest using steel fittings. I broke a brass nipple that I used to attach a tee. It fatigued through the exposed thread from the vibration and the weight of the senders.