TIRES TO FILL IN THE VOID ON 17" RIMS-my new tires suck

67 Barracuda had 255/50/17 could not find a tire in that size anymore. I had Riken tires before they suck too with 20,000 miles they are cracking already venders say the do not make them anymore. Just installed 275/40/17 out back and it looks really small. So what I am asking is what is everyone running on rear with 17 inch wheels that looks good. To me they look really small low profile. They grip good but looking for something to fill up the wheel well. I lowered the car an inch and it helped a bit. 17x9r 17x8f. willwood disc in front and 8.8 11" in rear